Unifying Spaces: Transforming Flats into a Single Home (Amalgamation and Deconversion)

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The intricate tapestry of urban landscapes tells the tale of human adaptation over centuries. Historical townhouses, particularly those opulent Victorian homes, are rich chapters in this narrative. Erected during an era where spacious, multi-room dwellings were a symbol of prosperity, they exuded an allure of magnificence. Yet, as urban demands intensified and housing needs shifted, these grand edifices were often dissected into individual flats – a pragmatic solution for an increasingly crowded and transient population.

View of Living of Kempe Road in NW London converting two flats to one house by RISE Design Studio
Kempe Road in NW London converting two flats to one house by RISE Design Studio

Fast forward to the present day, and the ethos is shifting once again. With a resurgence of interest in sustainable living and the need for spaces that evoke a sense of connection and continuity, there’s a renewed appetite for homes that echo the grandeur of yesteryears while incorporating the energy efficiencies of tomorrow.

For the contemporary homeowner, the allure of a deconverted space goes beyond mere nostalgia or the romanticism of living in a restored Victorian abode. It’s about reclaiming and repurposing space in a manner that resonates with today’s ethos. We’re seeing a growing tribe of homeowners who are not just looking for size or scale, but spaces that breathe, connect, and are in harmony with nature. They want homes that are both a nod to the past and a leap into the future.

This trend is not just an architectural fad. It’s rooted in deeper shifts in societal values and priorities. The modern-day homeowner is increasingly environmentally conscious. There’s an understanding that the choices we make in our homes today will have repercussions for generations to come. Thus, the deconversion process isn’t just about merging walls or restoring old fireplaces; it’s about integrating state-of-the-art sustainable technologies, ensuring energy efficiency, and reducing the carbon footprint of the dwelling. It’s about creating a home that’s warm in winter without being reliant on fossil fuels, a home that’s cool in summer without the need for power-hungry air conditioning.

In my tenure at our small contemporary design-led architecture studio, I’ve had the privilege of guiding numerous homeowners on this transformative journey of deconversion. Each project is a delicate dance of honouring the historical integrity of the space while weaving in modern, sustainable design elements. It’s an intricate process, replete with challenges, but the end result – a harmonious blend of the old and the new, the timeless and the innovative – is invariably worth the effort.

1. The First Step: Evaluating the Current State

Commencing a deconversion journey without a clear understanding of the current state of the property is much like setting sail on tumultuous seas without a compass. This primary step is vital not only from a design perspective but also from a legal and regulatory standpoint.

Historical Context and Alterations

Victorian homes, with their intricate detailing and grand designs, were often subjected to multiple alterations over the decades. The economic ebbs and flows, combined with the changing dynamics of urban living, meant that these dwellings often morphed to fit the needs of their inhabitants. A building that started as a singular grand family home might have been subdivided into multiple flats or bedsits to cater to the housing demand of different eras.

Interestingly, not all these modifications were done with the requisite permissions. In many cases, homeowners or landlords might have made these changes informally, without seeking the appropriate approvals from local authorities. While this might seem like a minor oversight, it bears significant implications for the present homeowner. If the property is still officially registered as a singular dwelling, despite its physical fragmentation, it can indeed simplify the deconversion process.

Navigating the Maze of Permissions and Regulations

Regardless of the historical context, it’s paramount to engage with your local council early on. This is not merely a box-ticking exercise. Engaging with the local council can offer clarity on several fronts:

  • Legal Status: Determine the official status of your property. Is it listed as a singular home or multiple dwellings? This information will serve as the foundation for your deconversion journey.
  • Architectural Integrity: A dialogue with the local council can help you glean insights into the architectural significance of the building, its history, and any heritage restrictions that might be in place. Victorian homes, given their age and cultural significance, might be subject to certain conservation regulations.
  • Planning Permissions: Based on the current state and official status of the building, you’ll need to understand what permissions are required for deconversion. This might range from simple internal modifications to more extensive structural changes.
  • Utilities and Services: Over time, divided homes often have utilities (like water, gas, and electricity) that are split among the units. It’s essential to assess these divisions and understand the implications of reverting them back to serve a singular residence.
  • Safety and Compliance: Older homes can sometimes harbour hidden issues – be it in the form of outdated wiring, plumbing anomalies, or structural wear and tear. Ensuring the safety and compliance of the home with modern standards is of utmost importance.

Seeking Professional Guidance

While it’s feasible to embark on the initial evaluation yourself, seeking the guidance of professionals – architects, surveyors, or heritage consultants – can be invaluable. They bring a wealth of experience and can preempt potential roadblocks, making the deconversion journey smoother and more efficient.

In conclusion, as the adage goes, ‘Well begun is half done.’ A thorough evaluation of the current state sets the tone for the subsequent stages of deconversion. It ensures that the journey back to grandeur is not just a romantic endeavour but one rooted in clarity, legality, and practicality.

2. Do You Need Planning Permission?

The allure of restoring a grand old home to its original state often comes with the assumption that, since you’re simply reverting to its initial design, there’s no need to get embroiled in the maze of permissions. Unfortunately, the reality isn’t always so straightforward. The act of deconversion, while it may sound simple, involves a slew of considerations, both architectural and regulatory.

Historical Overview: The 1990 Act and Beyond

The 1990 Town and Country Planning Act, which you may be familiar with, outlines the general permissions required for building and development works in the UK. Under this act, many internal and external alterations and extensions, often don’t require formal planning permission. This is termed as “permitted development rights”.

However, the landscape of urban planning and housing has evolved since then. In the year 2000 and beyond, with rising housing demands and urban densification, local councils became increasingly cautious of developments that led to a loss of housing units. The deconversion of a property from multiple flats to a singular residence, naturally, falls under this bracket.

Deconversion: A Balancing Act

While the idea of bringing a property back to its former glory is romantic, one has to navigate the fine balance between personal desires and community needs. Here are a few pivotal points to consider:

  • Loss of Housing: Local councils, especially in densely populated areas, are keen to ensure that there’s no significant loss of housing stock. If a building is currently home to multiple families and its deconversion would displace them, this can be a crucial factor in the decision-making process.
  • External Modifications: If your deconversion involves changes to the external façade, roofing, or any extensions, it will most likely require planning permission. Victorian homes, particularly those in conservation areas or listed buildings, have strict guidelines to preserve their historical and architectural integrity.
  • Infrastructure and Utilities: Combining utilities which had been separated – such as gas, water, and electricity – might need permissions, especially if they involve significant ground or structural work.
  • Local Housing Needs: This is a nuanced aspect that can vary from one council to another. If your area is facing a housing shortage or has specific goals for housing density, the council might be less inclined to approve a deconversion. It’s crucial to understand the local housing strategy and policies.

Professional Consultation and Pre-Application Advice

One way to navigate this complex terrain is to opt for a pre-application consultation with your local council. This process involves discussing your plans with the planning department before officially submitting your application. It offers a chance to understand any potential issues or concerns the council might have and provides an opportunity to make modifications before the formal submission.

Furthermore, enlisting the services of a seasoned architect can be invaluable. Their experience with the local regulations, coupled with a deep understanding of architectural possibilities, can guide you through the process with greater clarity and confidence.

In conclusion, while the path of deconversion is laden with multiple regulatory considerations, it’s not an insurmountable challenge. With the right guidance and a clear understanding of the local landscape, restoring a property to its singular grandeur can be both a feasible and deeply rewarding endeavour.

3. Housing Needs and Local Policies: Navigating Varied Terrains

While the broader strokes of housing and planning laws in the UK have a national framework, the detailed application of these laws is often left to local councils. This means that each council, driven by its own unique socio-economic realities, housing needs, and historical contexts, might have different policies regarding deconversion. Let’s delve into the varying terrains of housing policies across different boroughs, using London as a prime example.

Understanding London’s Mosaic of Housing Policies

London, with its rich tapestry of history, architecture, and socio-economic diversity, is a prime example of how varied local housing policies can be. Here’s a brief snapshot:

  • Kensington and Chelsea (RBKC): A borough with a rich history and some of the country’s most prestigious architectural gems, Kensington and Chelsea have always been protective of their residential stock. The council is often wary of any developments or alterations that might decrease the number of available housing units. This caution is borne out of a combination of preserving the borough’s character and ensuring a diverse mix of residents. Therefore, planning permission might be necessary for even minor deconversions, especially if it involves external modifications or loss of housing.
  • Westminster: Like RBKC, for even the slightest deconversions in Westminster, securing planning permission could be advisable, particularly if it involves changes to the exterior or impacts housing availability.
  • Camden: While still rooted in history, Camden has a more eclectic mix of architectural styles and a diverse population. As such, the council’s approach towards deconversions, especially for combining just two flats, might be more lenient. However, it’s still essential to be wary of localised regulations, especially if the property falls within a conservation area or if the proposed changes might have a broader impact on the local community.
  • Brent: Similar to Camden, the borough of Brent is generally more permissive when it comes to amalgamation.

Researching and Engaging: A Two-Pronged Approach

Given these varied terrains, adopting a dual strategy is imperative:

  • Research: Begin by diving deep into the specific housing policies of your borough. Most councils have their housing strategies, conservation area policies, and planning guidance available online. Look for any specific mentions of deconversions or the amalgamation of flats.
  • Engage: No amount of online research can replace direct engagement. Reach out to the planning department of your borough for a pre-application consultation. This not only helps in understanding their stance but also builds a rapport, which can be beneficial during the formal application process.

Other Variables to Consider

While the borough’s policy stance is crucial, it’s also essential to consider:

  • Local Housing Demand: A borough facing acute housing shortages might be less inclined to approve deconversions, even if their policies seem lenient.
  • Community Feedback: Neighbours and local community groups can influence the council’s decision. Engage with them early on to understand their concerns and, if possible, integrate their feedback into your plans.
  • Historical and Architectural Value: Properties with significant historical or architectural importance might have added layers of restrictions, regardless of the borough’s general stance.

In conclusion, the labyrinth of local housing policies might seem daunting at first, but with meticulous research and proactive engagement, it’s possible to navigate this terrain successfully. Understanding the unique pulse of each borough and aligning your project with local needs and sentiments is key to a smooth deconversion process.

4. Making a Case with a Lawful Development Certificate

Navigating the intricacies of housing policy and local planning regulations is often a complex dance, especially when you’re dealing with historical properties that might have seen a range of alterations and uses over their lifetime. In situations where a property has been functioning differently from its official status, the Lawful Development Certificate (LDC) emerges as a powerful tool. It’s designed to provide a legally binding determination of a property’s lawful use or development status. Let’s delve deeper into the LDC and understand how it can be utilised in the process of deconversion.

What is a Lawful Development Certificate?

A Lawful Development Certificate is a formal statement issued by the local planning authority, confirming the lawfulness of a property’s existing use, operational development, or failure to comply with a condition or limitation. In the context of deconversion, it serves to legitimise a singular use that has existed continuously for a particular period, even if it’s at odds with the property’s official designation.

When Should One Consider an LDC?

  • Existing Use for Over Four Years: If a property has been functioning as a single unit without the necessary permissions for over four continuous years, then this uninterrupted use can be legalised through an LDC.
  • Failure to Adhere to Conditions: If certain conditions or limitations were attached to previous planning permission and they’ve been breached for over ten continuous years, an LDC can be pursued.

Building a Strong Case: Steps to Obtain an LDC

  • Gathering Solid Evidence: One of the key factors in securing an LDC is proving the continuous use or the breach. Evidence might include utility bills, rental agreements, postal records, electoral register entries, affidavits from neighbours, and photographic evidence.
  • Application Process: Begin by filling out the necessary forms available from your local council’s planning department. Alongside the form, submit all the evidence that corroborates the use you’re claiming.
  • Council Review: Once submitted, the council will review the application and evidence. They might also conduct site visits and interview neighbours or local community members to verify the claims.
  • Decision: If the evidence is found to be compelling and aligns with the council’s criteria, an LDC will be granted, certifying the existing use or development as lawful.

The Benefits of Securing an LDC

  • Legal Clarity: An LDC provides a clear, definitive statement on the lawfulness of the property’s use, shielding homeowners from potential enforcement actions in the future.
  • Ease in Property Transactions: If you decide to sell the property, having an LDC can simplify the transaction process, as it eliminates any ambiguity regarding the property’s lawful use.
  • Peace of Mind: By ensuring that the property’s use aligns with the legal framework, homeowners can have peace of mind and focus on enjoying their restored space.

In summary, the Lawful Development Certificate serves as an essential instrument in the deconversion process, particularly for properties with a complex usage history. By meticulously gathering evidence and liaising with the local planning authorities, homeowners can legitimise their property’s use, ensuring a smooth and hassle-free deconversion journey.

5. Evaluating The Odds: Chances of Successful Deconversion

Undertaking a deconversion (amalgamation) can be a formidable endeavour, layered with multifaceted considerations and potential roadblocks. While the idea of restoring a property to its original splendour is an enticing one, the path to realisation is seldom linear. To grasp the prospects of a successful deconversion, it’s vital to evaluate several intertwined factors, each contributing to the larger picture of viability.

1. Restoration of Original Use

Importance: Reverting a property to its original state can be easier than significantly altering its structure. A building with a history of singular use, subsequently converted into multiple units, might find fewer obstacles when deconverted.

Challenges: Historical modifications might have drastically altered the property’s layout and structural integrity. Unearthing the original plans or accessing historic data can prove instrumental.

Impact on Success: If the property’s original design and structure are largely intact, this bodes well for the deconversion process.

2. Adherence to Space Standards for Family Homes

Importance: Ensuring a comfortable living environment is paramount. Deconverting should not compromise the space standards set for family homes, particularly in terms of room sizes, natural light, and ventilation.

Challenges: Some properties, when divided into flats, may have been modified to optimise smaller living spaces. Such alterations can make it challenging to restore rooms to their original, spacious configurations.

Impact on Success: A successful deconversion should align with contemporary expectations of living standards. Homes that can naturally adhere to or be adapted to meet these standards have higher success rates.

3. Consideration of Market Demands in the Area

Importance: Understanding the housing market in the vicinity is crucial. Are larger, singular homes in demand, or is there a predominant preference for individual flats?

Challenges: In areas where flats are in higher demand due to urbanisation or increased rental needs, deconversion might face market resistance.

Impact on Success: Ensuring that the deconverted property aligns with market demands can significantly increase its value and appeal, thereby enhancing the chances of a fruitful endeavour.

4. Ensuring the Non-Loss of Affordable Rental Units

Importance: With urban areas facing housing shortages, especially affordable rental units, it’s vital to weigh the societal implications of deconverting a property.

Challenges: Local councils might be resistant to deconversions that result in a decrease in affordable housing stock, particularly in areas with pronounced housing pressures.

Impact on Success: If a property’s deconversion leads to the loss of affordable units, obtaining permissions might be more challenging. Ensuring a balance or proposing alternate solutions can tip the scales in favour of a successful deconversion.

In Conclusion: Evaluating the odds of successful deconversion requires a holistic view, considering not just the architectural and logistical challenges, but also societal needs and market dynamics. While each property is unique, understanding these core factors can equip homeowners with the knowledge needed to navigate the deconversion process strategically, maximising their chances of success.

6. Precautions Before the Build

Launching a deconversion project is a significant undertaking, with the allure of crafting a unique, spacious residence from the patchwork of previously separated flats. Yet, beyond the sheer architectural and aesthetic considerations lies a web of regulatory intricacies that mandate careful planning. Ignoring these can lead to costly repercussions, both legally and financially. Here’s a comprehensive guide to the precautions one must consider before embarking on the actual construction phase.

1. Understand the Status of Your Building

Is it Listed? For buildings of historical or architectural significance, obtaining Listed Building Consent is non-negotiable. Altering such a structure without appropriate permissions can lead to severe legal consequences.

Conservation Areas: If your property resides within a conservation area, there might be additional restrictions on development to preserve the character and appearance of the area.

2. Building Regulations Approval

Beyond planning permissions, it’s essential to ensure that your deconversion project aligns with current building regulations. These regulations ensure that any building work is safe, energy-efficient, and accessible.

Why it matters: Even if your project doesn’t necessitate planning permission, building regulations approval is often still required. It covers aspects like fire safety, insulation, ventilation, and structural integrity.

3. Environmental Considerations

If your property is located near a watercourse or in an area of natural significance, there might be additional environmental permits and assessments to consider.

Flood Risk: Is the property in a flood-prone area? If so, assessments and precautions will be necessary to ensure the safety and sustainability of the build.

Ecological Impact: Before commencing work, ascertain if the construction might affect local wildlife or habitats. Mitigation strategies might be necessary to minimise any negative impacts.

4. Opting for Planning Permission

Even if the initial assessment suggests that planning permission isn’t strictly necessary, it might be prudent to opt for it regardless.

Benefits:

  • Flexibility: This provides a broader canvas and might allow for more extensive alterations than initially anticipated.
  • Security: It reduces the risk of future legal challenges or disputes with the local council.
  • Resale Value: Having all necessary permissions in place can enhance the property’s market appeal and value.

5. Engage with Neighbours and the Community

Although not strictly a legal requirement, it’s a considerate gesture to inform neighbours of impending construction. This can mitigate potential disputes or concerns and foster a sense of community understanding.

Feedback Loop: Engaging early can provide valuable insights or feedback, which might shape the trajectory of the project in a more community-friendly direction.

In Conclusion: The thrill of initiating a deconversion project is undeniable, but the foundation of any successful build lies in its meticulous planning. By heeding the above precautions, homeowners can ensure that their dream project doesn’t become mired in legal complications or unforeseen challenges, paving the way for a smoother construction phase and a delightful end result.

7. The Architect’s Perspective: Seeking Professional Guidance

Embarking on the journey of deconversion can feel akin to navigating a labyrinth, with its myriad twists and turns. However, this complexity, while daunting, is not insurmountable, especially with the guiding hand of professional expertise. Architect practices, such as RISE Design Studio, play a pivotal role in transforming what could be a formidable challenge into a manageable and even enjoyable process. Here’s why seeking professional guidance is indispensable:

1. Creative Problem-Solving

Innovative Solutions: A good architect doesn’t just follow guidelines; they think creatively. They can find innovative solutions to design challenges, ensuring your vision is realised without compromising on regulatory compliance.

Maximising Potential: An architect can help you make the most of your space, suggesting alterations that you might not have considered, which can significantly enhance the functionality and aesthetic appeal of your home.

2. Expertise in Local Building Regulations

Local Insights: Architects bring a wealth of knowledge about local building regulations. They can advise on the specifics of what’s permissible in your area, ensuring that your project adheres to all necessary legal standards.

Navigating Complexities: Given the complexity of building regulations, having a professional who can interpret these rules and how they apply to your specific project is invaluable.

3. Tailored Advice

Individual Circumstances: Every deconversion project is unique. A professional architect can provide advice that is specifically tailored to your individual circumstances and needs.

Personal Touch: Beyond the technical aspects, architects can align the design with your personal style and preferences, ensuring the end result feels like a true reflection of you.

4. Liaising with Local Authorities

Smooth Process: Architects can act as intermediaries between you and the local authorities. They understand the language and requirements of planning applications and can often expedite the process.

Avoiding Pitfalls: Their experience means they are adept at foreseeing potential objections or issues, allowing for preemptive solutions that avoid delays or rejections.

5. Quality Assurance

Attention to Detail: From the initial sketches to the final touches, architects are focused on quality. Their oversight can ensure that the construction process adheres to the highest standards.

Future-proofing: Good architectural guidance not only meets your current needs but also considers the longevity and adaptability of the space for future requirements.

6. Stress Reduction

Project Management: With an architect overseeing the project, the burden of managing various contractors and ensuring timelines are met is significantly reduced.

Peace of Mind: Knowing that your project is in the hands of professionals can provide immense peace of mind, allowing you to focus on the excitement of seeing your vision come to life.

In Summary: The role of an architectural firm in the process of deconverting flats into a singular, energy-efficient home cannot be overstated. It’s about much more than just blueprints and building codes; it’s about crafting a living space that resonates with its inhabitants, respects its surroundings, and stands the test of time. By leveraging the expertise of professionals like those at RISE Design Studio, homeowners can embark on this transformative journey with confidence, creativity, and clarity.

8. The Green Blueprint: Incorporating Low Energy and Reduced Carbon Design

Deconversion, or the process of converting multiple flats back into a singular residence, offers a golden opportunity to amalgamate the best of the old with the new, specifically in terms of energy efficiency and sustainable living. Being an advocate of sustainable architecture, I firmly believe that incorporating low energy designs into deconversion projects not only preserves the historical integrity of a building but also paves the way for a future-proof home. Here’s a deeper dive into the aspects linked to this sustainable approach in the context of deconversion:

1. Reusing and Recycling Materials

Conserving Heritage: Reusing materials from the original structure can maintain the authentic look and feel of the building while reducing the carbon footprint associated with manufacturing new materials.

Reduced Waste: By prioritising the recycling of old materials during the deconversion process, there’s a direct reduction in construction waste that might otherwise end up in landfills.

2. Thermal Efficiency

Insulation: Older buildings often lack proper insulation. As walls are reconfigured during deconversion, there’s an opportunity to integrate modern insulating materials that significantly improve thermal efficiency.

Windows and Doors: Retrofitting with double or triple-glazed windows and well-sealed doors can prevent heat loss, reducing the energy required for heating.

3. Renewable Energy Integration

Solar Panels: The expansive roofs of these buildings, once flats, provide ample space for solar panels, allowing homeowners to generate their own electricity.

Ground Source Heat Pumps: Deconversion often involves substantial groundwork. This presents a chance to integrate ground source heat pumps, an efficient way to heat homes using the earth’s consistent temperatures.

4. Sustainable Water Management

Rainwater Harvesting: Systems can be incorporated into the design, enabling homeowners to collect, store, and use rainwater, reducing the demand on local water supplies.

Greywater Recycling: Water from sinks, showers, and baths can be treated and reused for non-potable purposes like flushing toilets or irrigation.

5. Improved Ventilation

Natural Ventilation: Older buildings, while majestic, often suffer from poor ventilation. Design modifications during deconversion can introduce natural ventilation pathways, improving air quality and reducing reliance on mechanical systems.

Heat Recovery Systems: Modern ventilation units with heat recovery can extract warmth from outgoing stale air and use it to pre-heat incoming fresh air, ensuring an energy-efficient home.

6. Emphasis on Sustainable Interiors

Eco-friendly Materials: The choice of paints, finishes, and flooring can all be aligned with eco-friendly principles, ensuring that the home’s interiors are as green as its structural elements.

Energy-efficient Appliances: As part of the modernisation during deconversion, there’s the option to choose appliances that adhere to the latest energy efficiency standards.

7. Sustainable Landscaping

Native Plants: Once the deconversion is complete, consider landscaping with native plants, which typically require less water and care than exotic species.

Permeable Surfaces: Opt for permeable paving to reduce rainwater runoff and replenish groundwater.

In Conclusion: The process of deconversion offers a fresh canvas on which to paint a sustainable future. By considering low energy and reduced carbon designs, not only can we preserve the legacy of our architectural past, but we can also ensure that these majestic structures are resilient, efficient, and in harmony with our ever-evolving understanding of sustainable living.

How RISE Design Studio can help you?

Located in London with offices in Maida Vale and Fitzrovia, RISE Design Studio is a RIBA chartered architectural practice. We specialise in crafting innovative design and planning solutions, particularly in the realms of residential extensions, conversions, and brand-new home designs. Our mission is to assist homeowners in shaping spaces they truly love.

Should you wish for our expertise on your deconversion journey, please feel free to reach out.

If you would like to talk through your project with the team, please do get in touch at mail@risedesignstudio.co.uk or give us a call at 020 3290 1003

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Crafting an Oasis within the Urban Jungle: The Art and Intricacies of Backlands Planning

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Nestled within the confines of our contemporary urban sprawl lies an opportunity, often overlooked – the realm of the backlands plot. As an architect with two decades of experience leading a boutique, design-focused architecture studio, my journey has led me to deeply appreciate the charm and potential of backlands development. Our studio, passionate about pioneering sustainable and low embodied carbon designs, has been navigating the intricacies of backlands planning with a discerning and innovative eye, and I’m eager to share our insights and experiences with you.

Red Arches House - a new build house on a side garden of a house in Kensal Rise, North West London
Red Arches House – a new build house on a side garden of a house in Kensal Rise, North West London

Decoding the Backlands Puzzle

The backlands plot, a parcel of land situated at the rear or side of an existing property, can be an architectural gem in the making. Frequently a sizeable portion of a sprawling garden, these plots are often secluded from the bustling roads encapsulating them. The charm lies in their potential, large enough to cradle a new dwelling yet intrinsically private due to their positioning.

Historically, the practice of exploiting these plots was pejoratively referred to as ‘garden grabbing’, meeting opposition from local authorities. However, the lens through which we view these plots has transformed significantly in recent years. In our quest to fulfil housing needs in increasingly saturated environments, backlands development has emerged as a sensible and innovative strategy, enabling an escalation in housing density without expanding the urban footprint.

Such plots are a canvas for self-builders eager to create their dream abode on land they already own. However, treading the path of backlands planning isn’t without its hurdles. That said, a comprehensive application that anticipates and addresses pertinent concerns significantly heightens the odds of success.

A small house in Kensal Rise, North West London
A small house in Kensal Rise, North West London

Navigating the Labyrinth of Backlands Development

Embarking on a backlands project is akin to setting foot on a thrilling architectural expedition, punctuated by challenges to be surmounted. These hurdles revolve primarily around accessibility and the dynamics with neighbouring properties, though other considerations involving space, privacy, and design are of substantial significance.

A cardinal rule for a backlands plot to be planning-compliant is the availability of direct access to the road. This could be via a boundary fence, a discreet alleyway, or an access road. Ownership of the access pathway considerably simplifies matters when submitting the planning application.

Neighbourly relations can be a double-edged sword in backlands developments. Neighbours might view a new construction within their surroundings as intrusive, leading to potential opposition. However, objections can be mitigated if it can be convincingly demonstrated that the planning policies have been scrupulously followed, and that the development will not significantly impinge on the views or light entitlements of the neighbours.

Space and privacy are intertwined in the considerations that govern the success of backlands development. The proposed home must have sufficient space to breathe, avoiding a congested feel and aligning with the spacing pattern of the surrounding homes. Privacy is an integral part of this equation, with the plot location and proximity to neighbouring properties being critical elements.

Design, the backbone of our architectural vision, holds the key to successfully unlocking backlands plots. The constraints notwithstanding, creating a design that harmoniously balances your aspirations and the stipulations of the planning authorities can be a thrilling architectural challenge. The form and materials of the proposed structure may be dictated by the location, whether it involves adhering to a single-storey restriction to preserve view corridors or incorporating vernacular materials to harmonise with the local aesthetic.

Four new mews house in Kenton on a green open space, North West London
Four new mews house in Kenton on a green open space, North West London

Unlocking Success in Backlands Planning: A Guided Approach

Each planning authority has its own unique regulations and policies, making the expertise of an architect well-versed in backlands planning applications invaluable. Coupled with the insights of a planning consultant, their collective wisdom can pave the way for a successful application. While local area experience is beneficial, the core understanding needed is of backlands plots and their inherent constraints.

Here are some nuggets of wisdom for navigating backlands development:

  • Engage an experienced designer to guide your journey.
  • Keep your neighbours informed and involved from the outset to anticipate potential issues and defuse any brewing confrontations.
  • Undertake a planning pre-application to obtain expert advice and insights on potential challenges.
  • Strive to create a sustainable, future-proof home. The environmental advantages carry significant weight.
  • Demonstrate how the development will enhance the utilisation of the land.

Backlands Planning: A Case Study from North West London

One of our recent backlands planning applications and approvals involved an underused side garden situated close to a Conservation Area. Owing to the contentious nature of backlands plot applications, we embarked on a pre-application process to identify potential hurdles from the perspective of the local authority.

The pre-application advice is a fundamental part of the process, particularly for projects involving virgin sites or those seeking to establish key principles for site development before delving deep into the design process. This stage can be time-intensive but yields invaluable feedback from the local planning authority, providing clarity on the project’s viability and the likelihood of their support for your proposal.

This particular site already enjoyed road access, thanks to it being located at the side of a semi-detached plot enclosed by two roads. Additionally, the trees populating the pavement immediately adjacent to the site provided a natural screen, minimising visibility from neighbouring properties and ensuring no adverse impact on their views or light entitlements.

Contemplating a Backlands Adventure?

Are you intrigued by the prospect of transforming a backlands plot into a dream dwelling? Our experienced team at the studio would be delighted to guide you on this rewarding journey.

Red Arches House – a new build house on a side garden of a house in Kensal Rise, North West London

Frequently Asked Questions

  1. What is backlands planning permission?
    • Backlands planning permission refers to the process of obtaining approval to build a new home on a piece of land located at the back or side of an existing property, often within a large garden. It involves submitting a well-rounded planning application that addresses various considerations and potential barriers.
  2. Why has backlands development become more acceptable in recent years?
    • Backlands development, previously known as “garden grabbing,” is now viewed as a more acceptable way to address housing needs by increasing the density of houses in built-up areas. Local authorities have shifted their stance, considering it a viable option for self-builders to create new homes on land they already own.
  3. What are the main challenges of a backlands project?
    • The main challenges of a backlands project are access and neighbours. Other factors to consider include space, privacy, and design. Access to the road is crucial, either through a boundary fence, an alleyway, or an access road. Neighbours often oppose such developments, but objections can be overcome by demonstrating compliance with planning policies and minimal impact on views and rights to light.
  4. How can I ensure my backlands plot is planning friendly?
    • To make your backlands plot planning friendly, it should have direct access to the road, either through a boundary fence or an alleyway/access road. If you own the access, it simplifies the planning application process. Additionally, the proposed home should have adequate space around it to avoid a cramped feel and maintain the pattern of surrounding homes.
  5. What role does design play in backlands plots?
    • Design is crucial for backlands plots, as a well-thought-out and sensitive scheme can help overcome many of the challenges mentioned earlier. Design considerations may involve adhering to specific constraints, such as maintaining certain views or using materials that blend with the area’s character.
  6. Should I hire professionals for backlands planning applications?
    • Yes, it is recommended to hire an architect with experience in backlands planning applications and consider using a planning consultant. Their expertise will ensure you are better prepared for success, considering the unique regulations and policies of each planning authority.
  7. How can I address concerns from neighbours in a backlands project?
    • Keeping neighbours informed from the start and addressing their concerns can help avoid potential contests during the planning process. Maintaining open communication and considering their perspectives can help foster understanding and minimise conflicts.
  8. What is a planning pre-application, and why is it important for backlands projects?
    • A planning pre-application is a stage in the planning process where you seek advice and insights from the local planning authority before fully developing your design. It helps establish fundamental principles and gather feedback on the viability and support for your project. Pre-applications are particularly important for projects in new spots or areas where there hasn’t been a home before.
  9. How can I demonstrate the benefits of my backlands development?
    • To prove that your backlands development will improve the use of the land, you can focus on creating a sustainable and future-proof home. Highlighting the environmental benefits and showcasing how the development aligns with land use objectives can strengthen your case.
  10. Can you provide an example of a successful backlands planning application?
    • In a recent backlands planning application in North West London, a new dwelling was proposed on an underused side garden close to a Conservation Area. The site already had access from the road, and the new home was strategically concealed by neighbouring council trees, ensuring minimal impact on neighbours’ views and rights to light. See here for more details.

If you would like to talk through your project with the team, please do get in touch at mail@risedesignstudio.co.uk or give us a call on 020 3290 1003

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The Powerhouse Standard – Pioneering Eco Architecture

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Throughout my career, my focus has been on creating low-energy and low-embodied carbon designs that contribute to a sustainable future. However, there is one project that stands out among the rest – the Powerhouse initiative.

The Powerhouse standard, hailed as the world’s toughest eco-building benchmark goes far beyond traditional sustainability goals. To meet this extraordinary standard, a building must not only produce more renewable energy over its lifetime than it consumes but also account for the energy used in its manufacturing, construction, operation, future renovation, and even its eventual demolition. In essence, a powerhouse must generate more renewable energy over a typical 60-year lifespan than it consumes throughout its entire life cycle.

But before embarking on the journey of calculating the renewable energy output of a powerhouse, it must first meet the passive house standard. This ensures that the building is meticulously designed to be as energy-efficient as possible, minimizing its energy demands from the outset. In addition to these requirements, a Powerhouse must also be sold or rented at market rates, provide a healthy indoor climate, and generate all its renewable energy on-site or in close proximity, even utilizing wave or tidal energy if feasible.

The Powerhouse project emerged as a collaborative effort between renowned international architecture firm Snøhetta, Swedish contractor Skanska, the environmental NGO Zero, and various other partners. It was a groundbreaking endeavour that sought to redefine what was possible in terms of sustainable architecture.

Kjørbo, nestled along Sandvika's enchanting seafront, graces Bærum municipality near Oslo, Norway. These two refurbished structures, dating back to 1980, span roughly 2,600 square meters each. Their collective energy consumption amounts to a staggering 250 kWh per square meter every year.
Kjørbo, nestled along Sandvika’s enchanting seafront, graces Bærum municipality near Oslo, Norway. These two refurbished structures, dating back to 1980, span roughly 2,600 square meters each. Their collective energy consumption amounts to a staggering 250 kWh per square meter every year. Architect: Snøhetta

Chapter 1: Powerhouse Kjørbo – Reimagining the Past for a Greener Future

In 2014, the world witnessed the completion of the first building to meet the Powerhouse standard – Powerhouse Kjørbo. Situated just outside Oslo, this project involved the deep retrofitting of two 1980s office buildings. The transformation was remarkable. The original glazed facade gave way to triple-glazing and insulated panels adorned with beautifully charred timber cladding. As a testament to our commitment to sustainability, we repurposed the existing windows for interior partitions, minimizing waste and exemplifying the principles of the circular economy.

During construction, we prioritized recycling and reusing materials, resulting in over 90% of construction waste finding new life in other projects. But the true highlight of Powerhouse Kjørbo lies atop its roof – a massive 1,500 square meter solar photovoltaic array that produces twice the energy needed by the building itself. This remarkable feat serves as a shining example of how sustainable design can transform existing structures into powerhouses of energy production.

Chapter 2: Drøbak Montessori – Where Nature and Education Harmoniously Coexist

Nestled amidst the lush forests and overlooking the majestic Oslofjord, Drøbak Montessori, a timber-framed school, exemplifies the essence of the Powerhouse standard. Designed to generate an estimated 30,500 kWh of solar power annually, the school seamlessly integrates cutting-edge technology with architectural elegance.

At the heart of the design lies an angular “solar plate” clad with south-facing PV panels, positioned at an optimal 33-degree slope to harness the sun’s energy. This unique feature also functions as a ventilation “stack,” facilitating the expulsion of stale air while simultaneously drawing in fresh air to supplement the building’s heat recovery ventilation system. The integration of sustainable technologies and the use of natural materials seamlessly blend the boundaries between the built environment and the natural world, fostering an environment that inspires wonder and respect for nature.

Mervi Flugsrud, a member of Drøbak Montessori, succinctly captures the spirit of the school, stating, “We believe that the building itself will contribute to increased understanding and respect for nature. We eagerly anticipate moving into the greenest school in Norway, where sustainability is not just a concept, but a way of life.”

Powerhouse Telemark, in Postgrunn.
Powerhouse Telemark, in Postgrunn. Architect: Snøhetta

Chapter 3: Powerhouse Telemark – Paving the Way for Future Sustainability

As the Powerhouse initiative continues to gather momentum, the next project poised to meet this extraordinary standard is Powerhouse Telemark – an office building in the idyllic Norwegian town of Porsgrunn. With completion scheduled for the coming year, Powerhouse Telemark serves as a testament to our unwavering commitment to sustainable architecture.

Drawing inspiration from nature, the building will feature a design that seamlessly integrates timber construction, minimizing its carbon footprint while simultaneously providing a warm and inviting atmosphere. It will rest on “weather-resistant wooden poles,” extending into the pristine waters of Holandsfjorden, further emphasizing the harmony between the built environment and the natural landscape.

The true jewel in the Powerhouse crown is yet to come - Svart, an awe-inspiring hotel nestled at the foot of the Svartisen glacier in Norway's Arctic region
The true jewel in the Powerhouse crown is yet to come – Svart, an awe-inspiring hotel nestled at the foot of the Svartisen glacier in Norway’s Arctic region

Chapter 4: Svart – A Hotel Born from Nature’s Embrace

However, perhaps the true jewel in the Powerhouse crown is yet to come – Svart, an awe-inspiring hotel nestled at the foot of the Svartisen glacier in Norway’s Arctic region. Svart represents the culmination of our collective vision to create a circular building constructed primarily from timber, minimizing its impact on the environment while offering unparalleled comfort and luxury to its guests.

In preparation for this ambitious project, Snøhetta undertook an extensive study to map the behaviour of solar radiation in the fjord. The surrounding towering mountains and extended summer nights presented unique challenges, which we diligently overcame, ensuring that Svart’s solar PV systems would operate at optimal efficiency throughout the year.

As construction progresses, Svart is poised to become a beacon of sustainable hospitality, setting new standards for the industry and inspiring future generations of architects, designers, and travellers to embrace sustainable practices without compromising on luxury.

McKelvey Farm House, a highly sustainable new build home
McKelvey Farm House, a highly sustainable new build home

Conclusion: Shaping a Sustainable Future Through Architecture

In a world grappling with the profound challenges of climate change, architects have a moral responsibility to redefine the boundaries of what is possible. With over two decades of experience, I am privileged to have been a part of the Powerhouse initiative, a movement that seeks to reshape the future of architecture by pushing the boundaries of sustainability.

From the transformative retrofit of Powerhouse Kjørbo to the harmonious integration of technology and nature at Drøbak Montessori, and the forthcoming Powerhouse Telemark and Svart, each project has been a testament to the power of collaboration, innovation, and unwavering dedication to a sustainable future.

As architects, we have the unique ability to shape the world we live in. By embracing low-energy and low-embodied carbon designs, and adhering to standards as stringent as the Powerhouse benchmark, we can pave the way for a future where sustainability and architectural beauty coexist harmoniously. Let us embrace this challenge with open hearts and open minds, as we craft a world that not only sustains us but inspires us to reach ever higher for a brighter tomorrow.

In the following section, I’ve addressed some frequently asked questions about the Powerhouse standard.

Frequently Asked Questions

Q1. What is the Powerhouse standard?

A1. The Powerhouse standard is an ambitious green building standard that requires a building to produce more renewable energy than it consumes across its entire lifecycle, including material production, construction, operation, and deconstruction.

Q2. How does a building meet the Powerhouse standard?

A2. Firstly, the building must meet the Passive House standard to ensure maximum energy efficiency. Then, it must generate its own renewable energy, either on-site or nearby. The building also needs to offer a healthy indoor climate and be marketable at regular rates.

Q3. What was the first building to meet the Powerhouse standard?

A3. The first building to meet the Powerhouse standard was the Powerhouse Kjørbo, which involved retrofitting two office buildings from the 1980s.

Q4. How is the Powerhouse standard feasible?

A4. The Powerhouse standard is challenging but feasible. It involves a mix of energy-efficient design, on-site or nearby renewable energy generation, and sustainable construction practices, like recycling or reusing a large amount of construction waste.

Q5. What is the future of the Powerhouse standard?

A5. With more people recognising the need for sustainable construction, the future of the Powerhouse standard is promising. The upcoming Powerhouse Telemark and Svart hotel show that a variety of building types can meet the Powerhouse standard.

The Powerhouse standard stands as a beacon of possibility in a world desperately seeking paths to sustainability. It extends an invitation to all those within the realm of architecture, construction, and design to reimagine what our buildings can be, not merely shelters, but active contributors to a greener world.

If you would like to talk through your project with the team, please do get in touch at mail@risedesignstudio.co.uk or give us a call on 020 3290 1003

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RISE Design Studio Architects company reg no: 08129708 VAT no: GB158316403 © RISE Design Studio. Trading since 2011.

Planning permission granted in North West London – Red Arch House

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We are thrilled to announce that our latest planning application for a new home in North West London has been granted permission by the local planning authority. Red Arch House has been a labour of love for our team, and we’re excited to share the details with you.

Short video showing Red Arches House – a low energy home in Kensal Rise

Chapter 1: From Conception to Approval

The journey of this project began several months ago when we embarked on the initial design process. Our aim was to transform an underused side garden of a semi-detached Post War House into a contemporary, energy-efficient home. The site presented numerous challenges, including tree constraints and a previously undeveloped space. However, our experience and expertise in working with difficult conditions allowed us to propose a beautiful and sustainable solution.

To ensure a smooth planning process, we conducted a detailed pre-application consultation before submitting the full planning application. This involved working closely with design and planning officers from the outset to develop a design that would comply with all regulations and requirements. We strongly believe in collaborating with the authorities from the early stages to achieve the best outcome for both our clients and the community.

Planning permission granted for Red Arches House in Kensal Rise, North West London
Planning permission granted for Red Arches House in Kensal Rise, North West London

Chapter 2: Overcoming Design Challenges

One of the key factors in obtaining planning permission was addressing any potential design concerns. We consulted extensively with the Council’s Design Officer, who thoroughly reviewed our proposals. Their evaluation concluded that there were design concerns as the site was visible public view. The Officer commended the project for its sympathetic size, proportioned house design, which seamlessly blended contemporary aesthetics with materials suitable for the dense urban setting.

In our studio, we have a talented team of designers who crafted realistic renders that showcase the true potential of this project. The precast concrete bay windows, reclaimed brick front, rear, and side walls, and the striking red zinc roof create a visually stunning composition. We are genuinely thrilled with the outcome and believe that this design will be a remarkable addition to the architectural fabric of North West London.

Visual of the interior of Red Arches House in Kensal Rise, North West London
Visual of the interior of Red Arches House in Kensal Rise, North West London

Chapter 3: Looking Ahead

With planning permission secured, we are excited to embark on the next phase of this project: the technical design, SIPs (Structural Insulated Panels) panels manufacturing, and construction. Our meticulous attention to detail and commitment to energy efficiency will be integral to the successful execution of this unique 160m2 family home. We anticipate breaking ground later this year and cannot wait to witness the transformation of this previously under-utilised space into a vibrant and sustainable residence, which has been designed to Passivhaus standards.

Visual of the Kitchen of Red Arches House in Kensal Rise, North West London
Visual of the Kitchen of Red Arches House in Kensal Rise, North West London

Frequently Asked Questions

  1. How did you address the tree constraints on the site?
    • Our design team worked closely with an arboriculturist and the council’s Tree Officer to assess the impact of the proposed development on the existing trees. We carefully planned the positioning of the new home to ensure minimal disturbance to the trees, thereby preserving the natural environment.
  2. What construction methodology do you employ to achieve energy-efficient and sustainable designs?
    • Our studio specialises in employing sustainable construction methods, such as using low carbon concrete, using timber structure in lieu of steel where possible and potentially using modern construction methods like SIPs panels. These panels are prefabricated off-site, minimising waste and ensuring superior insulation for reduced energy consumption in the final structure.
  3. Can you provide more details about the design features that contribute to energy efficiency?
    • In addition to the SIPs panels, our design incorporates passive design strategies, such as strategic window placement to maximise natural light and ventilation. We also prioritise the use of energy-efficient appliances, renewable energy systems, and rainwater harvesting to minimise the carbon footprint of the home.
  4. How long does the construction process typically take for a project of this scale?
    • While each project is unique, and the duration can vary based on several factors, we estimate that the construction of this 160m2 family home will take approximately 7 to 10 months. We strive to adhere to strict timelines without compromising on quality. By utilising a SIPs approach, as mentioned above, for construction the time to build could be significantly reduced, see here for an article on SIPs.
  5. Do you offer services for obtaining planning permission for self-build projects?
    • Absolutely! We understand the complexities of the planning process and offer comprehensive services to guide self-builders through every stage, from initial concept development to the submission of planning applications. Our expertise in working closely with planning authorities ensures a higher probability of success.
Perspective section in 3D of the Kitchen of Red Arches House in Kensal Rise, North West London
Perspective section in 3D of the Kitchen of Red Arches House in Kensal Rise, North West London

Conclusion:

Obtaining planning permission for our new home project in North West London marks a significant milestone for our architecture studio. The approval signifies not only our ability to navigate challenging conditions and deliver sustainable designs but also our commitment to creating exceptional spaces that enrich local communities. We are grateful for the opportunity to embark on the next phase of this project and look forward to updating you on its progress. Stay tuned for more exciting developments.

Learn more about the planning permission process and how we can assist you in achieving your self-build dreams in our comprehensive article here.

If you would like to talk through your project with the team, please do get in touch at mail@risedesignstudio.co.uk or give us a call on 020 3290 1003

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RISE Design Studio Architects company reg no: 08129708 VAT no: GB158316403 © RISE Design Studio. Trading since 2011.

Understanding the New Era of Energy-Efficient Architecture in the UK

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The gravitation towards low energy and low embodied carbon designs has never been more pertinent. The UK, like many countries globally, is undergoing a significant shift in its approach to building energy performance. This article delves deep into understanding these changes, particularly from a landlord’s perspective.

View of the kitchen dining space in our Queen's Park House project in NW London by RISE Design Studio
View of the kitchen dining space in our Queen’s Park House project in NW London by RISE Design Studio

1. The Cornerstone: Energy Performance Certificates (EPCs)

EPCs, for those unfamiliar, play a pivotal role in the UK’s housing market. As a mandatory provision for rental properties, they offer potential tenants a window into a property’s energy efficiency. In simpler terms, a higher EPC rating can significantly increase the property’s allure to prospective tenants, acting as a beacon for those conscious of both their environmental impact and energy bills.

2. Navigating the New Building Regulations

The winds of change ushered in revamped Building Regulations on June 15th, 2022. Of these, landlords and developers must pay heed to:

  • Part L: Zeroing in on thermal performance.
  • Part F: Concentrating on ventilation.
  • Part O: A brand-new addition, highlighting overheating.

While these updated regulations predominantly focus on new constructions, existing properties undergoing major renovations aren’t exempt.

3. SAP’s Evolution: The New Assessment Methodology

The SAP assessment methodology’s technical upgrade is pivotal. Gone are the days when fossil fuel-based heating methods ruled the roost. The contemporary approach places energy-conserving building materials and non-fossil fuel heating methods on a pedestal.

4. The Changing Landscape for Landlords

From my interactions with landlords and fellow architects, it’s evident that these changes carry profound implications:

  • Transition in Heating Paradigms: Traditional gas boilers, once champions of heating, are now fading into the background, making way for sustainable alternatives.
  • The Advent of SAP10.2 Software: Elmhurst Energy‘s response to the shifting landscape. This sophisticated software transcends conventional energy cost assessments, capturing the essence of new builds’ energy efficiency.

5. The Legal Tapestry

Developers, brace yourselves! The new regulations are now enshrined in law. From conceptualising to habitation, these metrics are non-negotiable. Non-compliance is not only detrimental to our environment but can lead to legal ramifications.

6. EPC Scores: The Silent Influencers

Having been deeply entrenched in the property world, it’s clear that EPC scores are gaining traction. With mounting concerns over energy consumption, these scores heavily influence rental or purchase decisions, serving as the unsung heroes (or villains) of a property’s desirability.

7. The Economic Lens: Impact on Property Valuations

Anticipating market trends suggests a potential uptick in rent or sale prices for properties boasting EPC ratings of band C or higher. As the market plays catch-up, landlords must discern the long-term financial benefits of aligning with these regulations.

8. The Looming Shadow of Rising Energy Costs

The projections are stark. With the Ofgem fuel price cap speculated to soar above £3,000 by this year’s end and likely staying above £2,600 till late 2023, the clamour for energy-efficient homes will grow louder.

9. Tackling Fuel Poverty Head-On

Fuel poverty is an impending crisis, with countless UK households teetering on its brink. As architects and landlords, our responsibility extends beyond bricks and mortar. By championing energy-efficient properties, we can play a pivotal role in alleviating this looming challenge.

Conclusion: The Road Ahead for Sustainable Architecture

The architectural realm’s trajectory has never been clearer. With the new Building Regulations and SAP assessment shifts, the paradigm has undeniably changed. Landlords must not only adapt but also champion this change, ensuring their properties not only stand tall in the market but also embody the spirit of sustainability.

From my two-decade vantage point, I believe that marrying contemporary design with energy efficiency is the future – a future that is not only sustainable but also aesthetically breathtaking.

If you would like to talk through your project with the team, please do get in touch at mail@risedesignstudio.co.uk or give us a call at 020 3290 1003

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RISE Design Studio Architects company reg no: 08129708 VAT no: GB158316403 © RISE Design Studio. Trading since 2011.

The Power of Building Information Modelling (BIM): A Comprehensive Guide for Developers and Homeowners

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Welcome to the future of architecture! At RISE Design Studio, a small contemporary design-led architecture firm focused on low energy and low embodied carbon designs, we have embraced the power of Building Information Modelling (BIM) in our practice. With over 20 years of experience, we have witnessed the transformative impact of BIM on the way buildings are designed, constructed, and managed. In this comprehensive guide, we will explore the world of BIM, its benefits, and practical applications for architects, developers, and homeowners.

Architects reviewing a BIM model on a computer screen
The impact of using BIM on our projects has been transformative

Section 1: Understanding BIM

1.1 What is BIM?

Building Information Modelling (BIM) can be defined as the “use of a shared digital representation of a built asset to facilitate design, construction, and operation processes to form a reliable basis for decisions” (BS EN ISO 19650). BIM utilises digital parametric modeling to create comprehensive architectural design models and construction workflows. It is the present and future of architecture, revolutionizing the industry.

Using BIMx app on smartphones and tablets, giving Clients more control over decisions right the way through a project

1.2 The BIM Process in Architecture

The BIM process is all about creating a collaborative environment where all stakeholders can access and share a virtual model that contains detailed information about the building. Traditional methods involve numerous separate documents that are often lost or inaccessible. BIM eliminates these inefficiencies by providing a centralised digital model that ensures better visualisation, coordination, and development of designs. It streamlines communication and minimises errors, benefiting the entire project lifecycle.

Section 2: BIM in Architectural Practice

2.1 The Role of BIM in Architectural Services

As early adopters of BIM in the UK, we have experienced firsthand the advantages it offers in architectural services. Regardless of project scale, BIM’s 3D capabilities enable us to effectively communicate design concepts to clients and collaborators. We create digital representations of buildings that contain detailed information, from technical specifications to cost estimates, facilitating the development of construction projects. Our specialisation in using BIM for residential architecture allows us to collaborate with stakeholders, consultants, and authorities in a BIM environment.

2.2 Advantages of BIM for Developers

For property developers, BIM offers significant advantages beyond traditional architectural services. By demanding a higher level of information, developers gain better control over their projects. For example, by commissioning a point cloud laser scan survey, developers can obtain a detailed 3D digital model of the building. Through the BIM process, any changes made to the design are automatically reflected across all dimensions, ensuring consistency and reducing errors. BIM’s compatibility with the construction industry enables efficient coordination and seamless integration of project teams, resulting in cost and time savings.

2.3 Enhancing Design Communication for Homeowners

Homeowners can also benefit greatly from the implementation of BIM. Traditional floor plans and elevations often fail to convey the spatial experience of a design. However, by utilising BIM’s 3D modelling capabilities, architects can provide homeowners with a more immersive understanding of their projects. Tools like BIMx allow homeowners to explore 3D models on their phones or tablets, providing a sense of the space, flow, and atmosphere of their future homes. For those seeking an even more immersive experience, virtual reality models offer the sensation of walking through the building.

Everything is drawn in 3D when a project is drawn up in BIM, allowing for much greater understanding of the proposals prior to construction stage
Everything is drawn in 3D when a project is drawn up in BIM, allowing for much greater understanding of the proposals prior to construction stage

Section 3: BIM and the Building Lifecycle

3.1 Streamlining Construction and Building Control

The benefits of BIM extend beyond the planning phase, proving invaluable during construction and building control. By ensuring that all stakeholders use the same core information, BIM eliminates inconsistencies and reduces the risk of errors. The coordinated approach ensures that custom-manufactured elements, such as windows or kitchens, fit perfectly into the design, mitigating delays and additional costs. Furthermore, BIM proves indispensable for the post-construction phase, facilitating repairs, alterations, and maintenance by consolidating all relevant information in a single computer file.

3.2 BIM’s Role in Sustainable Design and Performance Monitoring

Sustainability is a key concern in modern architecture, and BIM can play a vital role in achieving environmentally conscious design and monitoring building performance. By integrating BIM with sustainable design strategies, architects can optimise energy efficiency, reduce waste, and minimise embodied carbon. Additionally, BIM enables the accumulation and sharing of data on building performance, allowing owners, architects, and local councils to make informed decisions for ongoing sustainability improvements.

Section 4: The Future of BIM

4.1 The Need for BIM in Planning Applications and Building Control

While BIM has become integral to the design and construction phases, its adoption in planning applications and building control processes is still limited. However, there is a growing consensus among architects and industry experts that BIM should be an essential component of these procedures. Integrating BIM visualisations and assessments into online planning platforms would improve coordination, reduce costs, enhance community involvement, and expedite decision-making. By incorporating building regulations into BIM effectively, architects and engineers can easily ensure compliance, resulting in faster and more efficient processes.

4.2 Overcoming Challenges and Embracing a Digital Future

Despite the potential benefits of integrating BIM into planning and building control, significant hurdles remain. These challenges encompass not only technological considerations but also the need for a cultural shift within planning departments and increased engagement with building performance. While the path towards a fully digitised planning system may be long, architects can lead the way by embracing BIM and leveraging its capabilities to design and construct buildings efficiently and sustainably.

By leveraging BIM's comprehensive digital models, architects can effectively communicate design concepts and collaborate with clients. Developers benefit from improved coordination and reduced errors throughout the construction process
By leveraging BIM’s comprehensive digital models, architects can effectively communicate design concepts and collaborate with clients. Developers benefit from improved coordination and reduced errors throughout the construction process

Conclusion

In conclusion, BIM has emerged as a transformative force in the field of architecture, offering architects, developers, and homeowners an array of advantages. By leveraging BIM’s comprehensive digital models, architects can effectively communicate design concepts and collaborate with clients. Developers benefit from improved coordination and reduced errors throughout the construction process. Homeowners gain a deeper understanding of their projects, making them active participants in the design process. Furthermore, BIM’s integration into planning applications and building control holds the promise of increased efficiency, sustainability, and transparency in the built environment. As architects with a strong commitment to low energy and low embodied carbon designs, we are proud to be at the forefront of the BIM revolution, utilising its power to create innovative, sustainable, and visually stunning buildings.

Frequently Asked Questions (FAQs):

Q1: What is the BIM process in architecture?

A1: The BIM process in architecture involves creating and coordinating information in a structured way using digital modelling. It allows for the sharing of a virtual model containing detailed information about a building among all project stakeholders, facilitating better visualisation, coordination, and development of the design.

With our expertise as BIM architects, we have a proven record of delivering projects using BIM. We can offer you the opportunity to explore a 3D model of your building on your phone or tablet through BIMx. This interactive model allows you to navigate and visualise the spaces from different angles. Additionally, if you desire a truly immersive experience of walking through your building, we can provide you with a virtual reality model. We strongly believe that the more you comprehend the design, the better equipped you’ll be to articulate your preferences, enabling us to fulfil your aspirations more efficiently.

Q2: What are the advantages of using BIM for developers?

A2: BIM offers several advantages for developers, including better control over projects, improved coordination among project teams, reduced errors, and time and cost savings. Through the BIM process, developers can ensure consistency across all dimensions of the design, resulting in efficient construction and streamlined project management.

Q3: How does BIM benefit homeowners?

A3: Homeowners can benefit from BIM by gaining a better understanding of their projects through immersive 3D visualisations. BIM allows homeowners to explore their designs in three dimensions, providing a realistic sense of space, flow, and atmosphere. This enhanced communication between homeowners and architects leads to a more collaborative design process and better outcomes.

Q4: Can BIM be used for sustainable design?

A4: Yes, BIM can play a significant role in sustainable design. By integrating BIM with sustainable design strategies, architects can optimise energy efficiency, reduce waste, and minimise embodied carbon. BIM also enables the collection and sharing of building performance data, allowing for ongoing monitoring and improvement of sustainability goals.

Q5: What is the future of BIM in planning applications and building control?

A5: The future of BIM in planning applications and building control holds great potential for improved efficiency, coordination, and transparency. Although challenges exist, such as technological integration and cultural shifts within planning departments, the benefits of incorporating BIM into these processes are undeniable. As the industry evolves, BIM is expected to become an integral part of the planning and building control systems, revolutionising the way buildings are designed, constructed, and managed.

If you would like to talk through your project with the team, please do get in touch at mail@risedesignstudio.co.uk or give us a call on 020 3290 1003

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RISE Design Studio Architects company reg no: 08129708 VAT no: GB158316403 © RISE Design Studio. Trading since 2011.

MVHR Heat Recovery Ventilation: What is it and how does it work?

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As an architect with two decades of experience, I have witnessed the evolution of sustainable design principles and their integration into contemporary architecture. In recent years, the focus has shifted towards low energy consumption and low embodied carbon designs. One crucial element in achieving these goals is Mechanical Ventilation with Heat Recovery (MVHR). In this article, I will delve into the concept of MVHR and explore its significance in creating environmentally conscious buildings. Join me on this journey as we unlock the secrets of MVHR and discover how it can revolutionise the way we think about ventilation.

MVHR, also known as Heat Recovery Ventilation (HRV) or Comfort Ventilation, is a system that provides fresh, filtered air into a building while retaining most of the energy that has already been used for heating. Its primary purpose is to meet the ventilation needs of energy-efficient buildings. Imagine a mechanism that not only supplies filtered clean air but also ensures optimal energy efficiency by recovering heat that would otherwise be lost. That is precisely what MVHR offers.

Image showing ducting from MVHR unit to all rooms of the house at Herbert Paradise, Kensal Rise, NW London
Image showing ducting from MVHR unit to all rooms of the house at our Herbert Paradise project in Kensal Rise, NW London

One Simple Principle

At its core, MVHR operates on a simple principle: it extracts air from polluted sources such as kitchens, bathrooms, toilets, and utility rooms, while simultaneously supplying fresh air to the living spaces, such as bedrooms, living rooms, and studies. The extracted air is then passed through a central heat exchanger, where the heat is recovered and transferred to the supply air. This process works both ways: if the air inside the building is colder than the outside air, the coolth is maintained within the structure. The result is a constant supply of fresh, filtered air that ensures high air quality, all while remaining practically imperceptible to the occupants.

Airtightness

Now, you might be wondering about the ideal level of airtightness required for MVHR to be worthwhile. While MVHR can be installed in any building, there is a rule of thumb that justifies its use only when the air permeability of the thermal envelope is at or below 3 air changes per hour, as tested at 50 Pascal. This value is roughly equivalent to 3 m³/m².h @ 50 Pa for average dwellings. Recent research conducted by the Passivhaus Trust suggests that MVHR ventilation could still be employed in less airtight homes, even those with a draughtier air permeability rate of 9 m³/hr/m² @ 50 Pa, as it would still yield lower carbon emissions compared to natural ventilation. However, it’s important to note that in very draughty homes, where the air permeability rate is worse than 9 m³/hr/m² @ 50 Pa, the efficacy and efficiency of an MVHR system may decrease.

Airtightness Test at Red Brick House – watch the video to see all that is involved when testing for airtightness

Temperature Difference

You might wonder why the temperature difference between the interior and exterior of a building is crucial for MVHR to function optimally. The answer lies in the phenomenon of thermal stacking, also known as the chimney effect. When there is a significant temperature difference, the natural buoyancy of warm air causes it to rise, creating a pressure difference that facilitates ventilation through the leakiness of the building envelope. In windy conditions, the wind acts as the driving force for ventilation. By implementing intermittent extraction points, such as in the shower or kitchen, a portion of the leakiness is reversed, enhancing the effectiveness of MVHR.

Addressing Condensation

Addressing condensation is another important aspect to consider when contemplating the installation of MVHR. If a building has poor insulation, thermal bridging, or other sources of damp ingress due to inadequate damp proofing, it might be tempting to seek technological solutions. However, I would strongly advise addressing the root cause of the problem rather than treating the symptoms. While MVHR can help reduce the symptoms of condensation and prevent mildew formation, resolving the underlying issues will yield more sustainable and long-lasting results.

Diagram showing the position of the MVHR unit and the ducting routes
Diagram showing the position of the MVHR unit and the ducting routes

The importance of a well designed MVHR system

The importance of good MVHR design cannot be overstated. Whether you are incorporating MVHR into a new build or a refurbishment project, it should be considered from the early planning stages. The devil is truly in the detail when it comes to MVHR system design. The efficiency and effectiveness of the system rely on meticulous planning, ensuring that ducts are run strategically throughout the building. The layout of rooms can even be influenced by ventilation requirements, demonstrating the integral role MVHR plays in the overall design.

Moreover, the installation of MVHR has implications for heating system design. One notable effect of heat recovery ventilation is the equalisation of temperatures throughout the building. This means that it becomes important to prioritise the heat supply to specific rooms that should be warmer than others. In high-quality buildings, it may even be sufficient to directly supply heat to these select areas, further optimising energy usage.

Frequently Asked Questions

Q: What is MVHR?

A: MVHR stands for Mechanical Ventilation with Heat Recovery. It is a system that provides fresh, filtered air to a building while recovering the heat from the outgoing air, thereby improving energy efficiency.

Q: How does MVHR work?

A: MVHR works by extracting air from polluted areas such as kitchens and bathrooms and supplying fresh air to living spaces. The extracted air passes through a heat exchanger, where the heat is recovered and transferred to the incoming air.

Q: What is the ideal airtightness level for MVHR?

A: While MVHR can be installed in any building, its use is typically justified when the air permeability of the thermal envelope is at or below 3 air changes per hour, as tested at 50 Pascal. This ensures optimal performance.

Q: Can MVHR be used in less airtight homes?

A: Recent research suggests that MVHR can still be employed in homes with less airtightness, but the efficacy and efficiency of the system may decrease in very draughty homes.

Q: Does MVHR help with condensation issues?

A: MVHR can help reduce condensation and prevent mildew formation, but it is crucial to address the underlying causes of poor insulation and damp ingress for a more sustainable solution.

Q: When should MVHR be considered in the design process?

A: MVHR should be considered early in the planning stages of a new build or refurbishment project to ensure proper system design and integration into the overall architectural layout.

Q: How does MVHR impact heating system design?

A: MVHR equalises the temperature throughout the building, so it is essential to prioritise heat supply to specific rooms that require higher temperatures. In some cases, it may only be necessary to provide direct heat to these areas.

The dual function extract and intake grill at our Ice Cream House project in Hampstead, North London
The dual function extract and intake grill at our Ice Cream House project in Hampstead, North London

In conclusion, MVHR has become a cornerstone of contemporary architecture, enabling the creation of energy-efficient buildings with improved indoor air quality. By recovering heat from the outgoing air and supplying fresh, filtered air to living spaces, MVHR not only enhances comfort but also reduces energy consumption and carbon emissions. However, it is crucial to consider MVHR from the early planning stages and ensure good system design to maximise its benefits. By incorporating MVHR into our architectural projects, we can pave the way towards a sustainable future where buildings are both eco-friendly and enjoyable to live in.

If you would like to talk through your project with the team, please do get in touch at mail@risedesignstudio.co.uk or give us a call on 020 3290 1003

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RISE Design Studio Architects company reg no: 08129708 VAT no: GB158316403 © RISE Design Studio. Trading since 2011.

Do I need an architect for an extension? The benefits, and alternatives, explained

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When it comes to embarking on a house extension project, one of the first questions that arises is whether or not to hire an architect. Opinions on this matter are often divided, and it usually boils down to budget considerations. Bringing in an additional professional service can increase costs, but it’s important to recognise the value they bring. This guide aims to shed light on the decision-making process, exploring alternative options and explaining the benefits an architect can offer.

Architects can add value to your project
Architects can add value to your project

The Need for an Architect: Exploring Alternatives

While architects are often the go-to professionals for design services, they are not the only option available. Depending on the scale and complexity of the extension, other routes may be more suitable.

For very small and simple extensions, a builder experienced in this type of work may be capable of providing the design. Alternatively, if you feel confident and have the necessary skills, you could even attempt the design yourself. However, if you have more ambitious ideas, such as glass extensions or unique requirements, involving an architect becomes crucial.

To make an informed decision about whether or not you need an architect, let’s explore the various types of house design professionals and what they can offer.

The Value of an Architect: What They Bring to the Table

When discussing architects, it’s essential to understand their qualifications and expertise. The title “architect” is reserved for professionals who have completed seven years of training and are registered with the Architects Registration Board (ARB). Most architects will also be Chartered Members of the Royal Institute of British Architects (RIBA).

While there’s no legal requirement to involve an architect in your extension project (unlike in some other European countries), there are several compelling reasons to consider hiring one. An architect’s training and experience make them particularly valuable for those new to the world of extensions or dealing with complex criteria and challenging sites.

By using the latest drawing software Architects can demonstrate many options that best meet your Client Brief, are sympathetic to context and meet your project budget
By using the latest drawing software Architects can demonstrate many options that best meet your Client Brief, are sympathetic to context and meet your project budget

Here are the benefits an architect can provide for your extension project:

  1. Design Excellence: Architects possess a unique blend of creativity, technical expertise, and problem-solving skills. They excel at translating a client’s vision into innovative and functional designs that inspire and transform spaces.
  2. Maximising Existing Space: Architects are trained to assess existing spaces and make the most of them. They can optimise the use of available space in creative and innovative ways, ensuring functionality and efficiency.
  3. Sustainable Design Approach: In an era where environmental concerns are paramount, architects from sustainably-focussed practices prioritise environmentally responsible design solutions. They integrate energy efficiency, renewable resources, and low embodied carbon principles into their designs, contributing to a sustainable future.
  4. Plot Maximisation: Architects understand how to make the best use of the plot your house occupies. They consider factors such as orientation, views, and privacy to create designs that harmonise with the site.
  5. Fresh Ideas and Solutions: Drawing from their training and experience, architects can offer ideas and solutions you may not have considered. Their creative input can elevate your project and provide unique design concepts.
  6. Knowledge of Construction Methods and Technologies: Architects stay up-to-date with the latest construction methods and technologies. They can incorporate sustainable practices, energy-efficient systems, and innovative building materials into your design.
  7. Bridging the Gap between Vision and Reality: Architects are skilled at translating your brief into tangible designs. They have the expertise to balance your requirements, budget, and aesthetic preferences to create a design that meets your expectations.
  8. Industry Connections: Architects have established relationships with reliable builders and tradespeople. They can recommend contractors they have previously worked with, ensuring a smoother collaboration and better project outcomes.
  9. Compliance and Professionalism: Architects adhere to a statutory code of practice and carry Professional Indemnity Insurance. They are knowledgeable about the planning system, building regulations, and can guide you through the application process.
  10. Well-being and Sustainability: Architects from design-led practices prioritise occupant well-being and sustainability. They consider factors like natural light, indoor air quality, and biophilic design principles to create spaces that enhance comfort, productivity, health, and happiness.
  11. Expertise in Low Energy Design: Reducing energy consumption and minimising carbon emissions are crucial in the fight against climate change. Architects from design-led, sustainable practices possess specialised knowledge in low-energy design strategies. They incorporate passive design principles, optimise natural light, ventilation, and thermal insulation, creating energy-efficient buildings that prioritise occupant comfort.
  12. Attention to Detail and Craftsmanship: Architects are able to dedicate meticulous attention to detail and craftsmanship. They collaborate closely with contractors, and artisans to ensure the design intent is executed with precision, resulting in durable, practical and beautiful buildings.
  13. Contextual and Community Engagement: Architects appreciate the significance of context and community in architectural design. They undertake thorough site analyses, considering factors such as climate, topography, cultural heritage, and social context. By engaging with the local community and stakeholders, they create buildings that harmonise with their surroundings and reflect the unique identity of the community.
  14. Recognition and Awards: Architects from award-winning practices have a proven track record of excellence. Their designs are recognised and celebrated for their innovation, sustainability, and contribution to the field of architecture. Engaging with such architects allows clients to benefit from their wealth of experience, expertise, and industry recognition, ensuring that their project stands out and exceeds expectations.

By working with an architect, you benefit from their ability to offer fresh perspectives, transform your vision into reality, and navigate the complexities of design and construction.

We at RISE Design Studio use drawing software that can be exported to your smartphone or tablet so that you can explore the proposals in 3D
We at RISE Design Studio use drawing software that can be exported to your smartphone or tablet so that you can explore the proposals in 3D

Addressing Concerns: Cost and Misalignment

The primary concern for many considering an architect is the cost. Hiring an architect will involve allocating a portion of your budget to the design phase, typically ranging from 5% to 18% of construction costs depending on the level of involvement. However, the value they bring to the project can outweigh the additional expense. Moreover, a skilled architect can help identify cost-saving opportunities and optimise the overall project budget.

Misalignment between the client’s vision and the architect’s design choices is another potential concern. However, this can be mitigated by ensuring clear communication and finding an architect who understands your needs and preferences. By reviewing their previous work and speaking with their previous clients and discussing your expectations upfront, you can find a compatible architect who respects your input.

Flexibility in Service Options and Clarity in Project Requirements

Architects offer various service options, allowing you to tailor their involvement to suit your project’s needs. You don’t necessarily have to opt for a full-service package; instead, you can choose the level of engagement that fits your requirements and budget.

To ensure success, it’s crucial to be clear about your project goals, needs, and budget from the outset. Open and transparent communication with your architect will help them understand your vision and deliver a design that meets your expectations.

Red Arches House, Kensal Rise, North West London
Red Arches House, Kensal Rise, North West London

Considering the Alternatives

While an architect may be the ideal choice for many extension projects, it’s worth exploring alternative options to find the best fit for your needs.

  1. Architectural Technologist: An architectural technologist focuses on the design, production, and performance of buildings through the integration of technology. They can provide innovative designs, submit planning applications, coordinate trades, and project manage the extension. It’s important to ensure they have experience and expertise in the type of design you’re seeking.
  2. Draughts-person: A draughts-person can transform your ideas and sketches into precise plans and technical drawings. While they are generally cheaper than architects, they may lack the same breadth of experience and design innovation.
  3. Builder: Some builders are capable of producing simple sets of house plans. However, their design capabilities and experience may be limited, so caution is advised unless you have seen their previous work and spoken to past clients.
  4. Design and Build Firms: Design & Build Contractors handle the design aspect as part of their services as well as the build. This can streamline the process, but it’s essential to ensure their design aligns with your vision and requirements.
  5. DIY Design: Designing your own extension can save money on design fees, and you have complete control over the outcome. However, it’s important to consider the complexity of the planning process, building regulations, and the need for detailed plans. Software packages can assist in creating professional designs, but thorough research and understanding of regulations are crucial.

Conclusion

When deciding whether or not to involve an architect in your extension project, it’s essential to consider the specific needs and requirements of your project. While an architect brings expertise in design, sustainability, and overall project management, alternative options may be suitable for simpler extensions or budget-conscious clients.

The value an architect (from a sustainably focussed practice) brings lies in their ability to create exceptional designs that inspire and prioritise sustainability, well-being, and craftsmanship. Their expertise in low-energy design, attention to detail, and holistic approach sets them apart, resulting in buildings that leave a positive impact on the environment, occupants, and communities they serve.

Ultimately, the choice of whether to hire an architect for an extension project depends on your budget, project complexity, and the level of creativity and expertise you desire.

If you would like to talk through your project with the team, please do get in touch at mail@risedesignstudio.co.uk or give us a call on 020 3290 1003

Contact us

RISE Design Studio Architects company reg no: 08129708 VAT no: GB158316403 © RISE Design Studio. Trading since 2011.

What is EnerPHit? Is it right for my home retrofit project?

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EnerPHit aims to achieve similar levels of energy efficiency as Passivhaus for retrofitted buildings. In this guide, I will provide you with a comprehensive overview of EnerPHit, its requirements, the benefits it offers, and the considerations you need to keep in mind if you are planning a retrofit project.

EnerPHit vs. Passivhaus

While Passivhaus standards are primarily applied to new builds, EnerPHit focuses on retrofitting existing properties. Retrofit refers to a form of renovation aimed at significantly reducing energy consumption and improving the thermal performance and comfort of a home. Unlike Passivhaus, which can start from a blank canvas, retrofitting involves working with existing buildings where many elements like geometry, orientation, and structural approach are already predetermined. Additionally, retrofit projects may have thermal bridges (or cold bridges) that are challenging to eliminate completely.

The EnerPHit standard acknowledges these challenges and sets slightly lower performance requirements compared to Passivhaus, considering the limitations of retrofitting existing buildings. To meet the EnerPHit standards, a space heating and cooling demand of 25 kWh/m2/year is required (compared to the Passivhaus standard of 15 kWh/m2/year). Airtightness performance should achieve 1.0 air changes per hour (compared to the Building Regulations for new homes, which require between 5 and 15 air changes per hour). While achieving these standards may use more energy than Passivhaus, it still represents a significant improvement over most existing homes and even new builds.

Douglas House, Kensal Rise, North West London. Douglas House includes MVHR, high levels of insulation and airtightness
Douglas House, Kensal Rise, North West London. Douglas House includes MVHR, high levels of insulation and Airtightness and Solar PVs

Guidelines and Design Considerations

EnerPHit provides a benchmark for renovators to work towards. Similar to Passivhaus, the Passivhaus Planning Package (PHPP) design tool is used when designing an EnerPHit scheme. This tool helps deliver more efficient buildings by considering factors like orientation and geometry at an early design stage. The PHPP enables informed decision-making regarding retrofit measures, cost implications, and energy considerations.

It’s important to note that retrofitting is not an easy task, and achieving the EnerPHit standard requires careful planning and execution. The thermal and airtightness strategies are likely to be more complex and challenging on site compared to new builds. Balancing the pros and cons of internal or external insulation is a critical consideration, as well as addressing potential moisture issues that may arise from changing the building fabric. Undertaking an EnerPHit retrofit demands a skilled and knowledgeable design team that can navigate these complexities.

Retrofit Measures and Certification Process

When carrying out an EnerPHit retrofit, several measures are required to meet the standard. These include:

  • High levels of insulation, either internal or external (with internal insulation requiring more attention to moisture risk)
  • High-performance triple-glazed windows and external doors
  • Careful window installation
  • Achieving an airtightness reading of 1.0, and
  • Implementing a Mechanical Ventilation with Heat Recovery (MVHR) system.

To receive EnerPHit certification, the process is similar to working towards Passivhaus certification. The project must be designed using the PHPP and certified by an accredited Passivhaus certifier. While the products used in the retrofit do not need to be Passivhaus certified, having certified products, especially for MVHR equipment, can be beneficial.

To make EnerPHit retrofits more accessible, the Passivhaus Institute has introduced the EnerPHit Retrofit Plan, a step-by-step certification process that allows payments for certification to be made in stages. This helps with funding for retrofit projects and provides a structured approach to achieving certification.

Herbert Paradise, Kensal Rise, North West London. Includes MVHR, ASHP, Airtightness, Solar PV and high levels of insulation
Herbert Paradise, Kensal Rise, North West London. Includes MVHR, ASHP, Airtightness, Solar PV and high levels of insulation

Cost Considerations

The cost of an EnerPHit retrofit can vary depending on the complexity of the existing building. As a general guideline, budgeting around £800-£1,000 per square meter for deep retrofit/EnerPHit, excluding VAT, is advisable. When considering specific components or systems, expect to pay around £10,000 for an MVHR unit installed in an average-sized house and approximately £400-£600 per square meter for windows and doors. However, the major costs lie in labor, as the installation of insulation and airtightness measures is time-consuming and requires meticulous attention to detail.

Insulation and Retrofit Challenges

One of the significant challenges faced by retrofitters is determining the optimal placement of insulation to improve the energy efficiency of existing houses. Regardless of where the insulation is placed, it is likely to create some issues. Internal wall insulation, for example, raises concerns about condensation and mold growth. When insulation is added to the inside of a wall, it can make the wall colder and disrupt the balance that previously allowed moisture to evaporate. This can lead to trapped moisture within the new wall assembly.

The Society for the Protection of Ancient Buildings (SPAB) has highlighted the issue of interstitial condensation and conducted research to better understand when and where it may occur. While specific recommendations may vary, the general advice is to avoid internal wall insulation in very exposed locations with porous external surfaces, as it can interfere with moisture management. This advice applies to buildings of any era, not just ancient ones.

Douglas House, Kensal Rise, North West London. Douglas House includes MVHR, high levels of insulation and Airtightness and Solar PVs
Douglas House, Kensal Rise, North West London. Douglas House includes MVHR, high levels of insulation and Airtightness and Solar PVs

Is EnerPHit Right for Your Home?

Considering an EnerPHit retrofit makes the most sense when you are already planning renovation or remodeling work on your house. If you are contemplating changes to your home to improve energy efficiency, EnerPHit offers a compelling opportunity. For instance, when replacing the roof or windows, it becomes easier to justify investing in high-performance materials that align with the EnerPHit standards.

While an extension project may not be the ideal time for a retrofit, it provides an excellent opportunity to create a long-term whole house plan that integrates the extension seamlessly and ensures compatibility with future retrofitting efforts. Planning for an EnerPHit retrofit from the beginning can help you achieve high levels of comfort and thermal performance in your home.

Light House, Clapham, South London. Light House includes MVHR, high levels of insulation and Airtightness and Solar PVs

Conclusion

EnerPHit represents the pinnacle of energy-efficient retrofitting, aiming to bring existing properties to levels of energy efficiency comparable to Passivhaus standards. While retrofitting poses unique challenges compared to new builds, the EnerPHit standard provides guidelines and benchmarks for achieving exceptional performance. With careful planning, skilled design teams, and a comprehensive understanding of the complexities involved, EnerPHit retrofit projects can transform existing properties into low energy and low embodied carbon homes.

By adhering to the principles of EnerPHit and working towards certification, you ensure rigorous quality assurance, airtightness performance, and adherence to the design objectives. While EnerPHit retrofit costs can vary depending on the complexity of the project and project location, the long-term benefits of improved energy efficiency, comfort, and reduced carbon emissions make it a worthwhile investment for homeowners looking to create sustainable living spaces.

So, if you’re considering renovating your home with the goal of achieving high levels of comfort and thermal performance, now is the time to plan for an EnerPHit retrofit. Embrace the challenge, work with knowledgeable professionals, and unlock the potential of your existing property to become an energy-efficient haven that aligns with your sustainability goals.

If you would like to talk through your project with the team, please do get in touch at mail@risedesignstudio.co.uk or give us a call on 020 3290 1003

Contact us

RISE Design Studio Architects company reg no: 08129708 VAT no: GB158316403 © RISE Design Studio. Trading since 2011.

Exploring Structural Insulated Panels: Are SIPs Right for Your Self-build project?

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In the world of modern construction methods, structural insulated panels (SIPs) have emerged as a groundbreaking solution that offers numerous advantages over traditional build methods. With their ability to accelerate the construction process, achieve exceptional airtightness, and reduce energy consumption, SIPs have garnered significant attention in the architectural industry. In this comprehensive guide, we will delve into the world of SIPs, exploring their benefits, drawbacks, cost implications, and provide expert advice on how to ensure a successful SIPs build. Join us on this journey as we discover how this innovative construction system is revolutionising the industry.

What is a Structurally Insulated Panel (SIP)? Showing the sandwich of OSB and foam insulation
What is a Structurally Insulated Panel (SIP)?

Chapter 1: Unveiling the Potential of Structural Insulated Panels

To understand the advantages of SIPs, we must first comprehend their fundamental nature and composition. Structural insulated panels are essentially panels comprised of insulation foam sandwiched between two oriented strand boards (OSB), which act as the structural components of the building. These panels come in standardised sizes and can be customised to suit specific project requirements. By utilising SIPs for external walls, internal load-bearing walls, and roof panels, architects can tap into the numerous benefits they offer for contemporary design-led architecture studios that prioritise low energy and low embodied carbon designs.

New build Post War Victorian House, Kensal Rise - to be built using SIPs
New build Post War Victorian House, Kensal Rise – to be built using SIPs

Chapter 2: The Pros of Building with Structural Insulated Panels

2.1 Enhanced Thermal Performance and Airtightness

One of the significant advantages of SIPs over traditional timber frame constructions is their superior thermal performance. With timber studs spaced at 1200mm centres, SIPs dramatically reduce repeated cold-bridging, thereby improving the overall energy efficiency of the building. Moreover, the inherent airtightness of the OSB boards and the rigid insulation core contribute to minimal air leakage, making SIPs an excellent fit for energy-efficient projects such as Passivhaus designs.

2.2 Efficient and Speedy Construction Process

SIPs’ factory-made panels offer greater accuracy and consistency compared to on-site cut timber frames, resulting in minimised gaps during construction. This, coupled with the off-site fabrication process, significantly reduces build times and ensures a safe and dry environment during the construction phase. By opting for SIPs, architects can achieve a watertight stage swiftly, accelerating the overall project timeline and reducing costs associated with scaffolding, plant hire, and site insurance.

SIPs panel showing how it is made, including holes for electrical cables
SIPs panel showing how it is made, including holes for electrical cables

2.3 Versatile Design Possibilities

The structural integrity of SIPs eliminates the need for traditional roof trusses, providing architects with the freedom to create unique and spacious interiors. By spanning up to 4.8m from eaves to ridge, SIPs allow for higher ceiling heights, transforming the living spaces into open and visually stunning areas. This versatility opens up a world of design possibilities, enabling architects to craft contemporary, light-filled homes that align with the aesthetic preferences of their clients.

Chapter 3: Understanding the Limitations of Structural Insulated Panels

3.1 Moisture Sensitivity

While SIPs offer exceptional benefits, their vulnerability to moisture is an important consideration. It is not recommended to use SIPs in flood zones or below ground, as the exposure to moisture can compromise their structural integrity. In such cases, masonry builds might be a more suitable alternative. However, architects can explore hybrid solutions, combining masonry for the ground floor and SIPs for the upper storeys, to strike a balance between the advantages of both construction methods.

3.2 Ventilation Requirements

The airtightness of SIPs necessitates adequate ventilation strategies to prevent condensation buildup and maintain air quality within the home. Incorporating mechanical ventilation heat recovery (MVHR) systems can help achieve a balanced airflow, ensuring a comfortable and healthy living environment. Architects should work closely with HVAC professionals to integrate ventilation systems seamlessly into the design and optimise energy efficiency.

3.3 Limited Availability of Experienced Builders

SIPs are still considered a specialised build system, and finding experienced builders who are proficient in working with SIPs might pose a challenge. Architects should collaborate with reputable SIPs manufacturers and actively seek out builders with expertise in this construction method. Establishing strong partnerships with experienced professionals can contribute to the success and efficiency of the SIPs project.

Chapter 4: Examining the Load-Bearing Capabilities of Structural Insulated Panels

In the world of construction, one persistent misconception revolves around the load-bearing potential of Structural Insulated Panels (SIPs). This chapter delves into this topic, shedding light on the versatile applications of SIPs in both structural systems and as infill walling elements. Architects and builders can harness the inherent load-bearing capabilities of SIPs to craft efficient and adaptable designs that align precisely with their project’s unique structural prerequisites.

Dispelling the Misconception: SIPs as Load-Bearing Components

It’s not uncommon for individuals in the construction industry to question whether SIPs possess the necessary strength to serve as load-bearing elements. To address this concern, it’s crucial to understand the dual roles SIPs can play in building construction:

1. Full Structural System:

SIPs can indeed serve as a comprehensive structural system for a building. Contrary to the misconception, they are more than capable of bearing the vertical and horizontal loads imposed by the structure. SIPs are engineered with precision, incorporating both the insulating core and structural facings, which, when combined, provide remarkable load-bearing capabilities.

2. Infill Walling for Various Frame Structures:

Beyond being a standalone structural system, SIPs can be employed as infill walling for other frame structures, including steel, concrete, oak, or glulam timber frames. In this capacity, SIPs function as an integral part of the building envelope, offering superior insulation properties while contributing to the overall structural integrity of the building. Architects can seamlessly integrate SIPs into these diverse frame systems, harnessing their thermal efficiency and load-bearing attributes.

Unlocking Architectural Versatility with SIPs

The load-bearing capabilities of SIPs unlock a world of architectural possibilities. Architects can leverage these panels to design buildings that are not only energy-efficient but also structurally resilient. Here are some key advantages:

Efficiency and Sustainability: SIPs’ load-bearing capacity enhances energy efficiency, reducing the need for extensive structural components and resulting in resource-efficient construction.

Design Flexibility: SIPs’ adaptability allows architects to create versatile and innovative designs, seamlessly blending aesthetics with structural integrity.

Speed of Construction: The use of SIPs as load-bearing components accelerates construction timelines, saving time and resources.

Structural Customization: Architects can tailor SIPs to meet specific structural requirements, ensuring they align perfectly with the project’s vision.

In conclusion, Structural Insulated Panels (SIPs) dispel the misconception surrounding their load-bearing capabilities. They can function as both a complete structural system and as infill walling for various frame structures, offering architects a wide range of design options. By harnessing the thermal efficiency and structural strength of SIPs, architects can create buildings that are not only environmentally sustainable but also architecturally remarkable.

Chapter 5: Analysing the Cost Implications of Structural Insulated Panels

5.1 Initial Investment vs. Long-Term Savings

It is essential to evaluate the cost implications of SIPs, considering both the initial investment and the long-term savings. While SIPs can be more expensive upfront compared to traditional timber frame constructions, the overall project costs typically increase by only 3-5%. The time saved during construction, reduced energy consumption, and enhanced thermal performance can offset the initial investment over the lifespan of the building.

5.2 Cost Comparison with Other Wall Systems

When comparing the costs of different wall systems, brick and block constructions may appear to be a more cost-effective option per square meter. However, the extended construction timeline, additional expenses associated with insulation, and challenges in achieving similar levels of airtightness make SIPs a competitive choice. By carefully managing construction details and employing skilled contractors, the overall additional cost of SIPs may be more minimal than it initially appears.

Chapter 6: SIPs Panel Types

When it comes to Structural Insulated Panels (SIPs), architects face a choice between two primary panel types, each offering unique advantages. Below, we explore these options to help you make an informed decision for your low-energy design project.

1. Sandwiched Panels (OSB-Polystyrene):

  • Thermal Efficiency: These panels excel at insulating, helping maintain stable indoor temperatures and reducing energy consumption.
  • Structural Strength: They provide robust construction, with resistance to wind and seismic forces.
  • Ease of Construction: Standard sizes and straightforward installation streamline the building process.

2. Urethane-Infused Panels:

  • Enhanced Insulation: Urethane foam offers superior thermal efficiency, ideal for stringent energy conservation standards.
  • Reduced Thickness: Thin profile, equivalent insulation values – suitable for space constraints or modern aesthetics.
  • Moisture Resistance: Resistant to moisture, making them great for humid or damp climates.

Collaborate with Experts:

Consult reputable SIPs manufacturers to align panel choice with your project’s specific needs. Their expertise ensures your selection suits your goals perfectly.

Chapter 7: Unveiling the Joining Techniques for Structural Insulated Panels

Creating an effective jointing system is crucial to achieving optimal thermal performance and airtightness with SIPs. Architects must explore different jointing techniques, such as using c24 timber for structural joints or employing spline joints for non-structural elements. Additionally, manufacturers offer unique jointing systems utilising mini panels to enhance wall U values and minimise air leakage at connection joints. By choosing the appropriate jointing techniques, architects can ensure the long-term performance and durability of the SIPs building.

Clays Corbridge House by EDable Architects, built using SIPs
Clays Corbridge House by EDable Architects, built using SIPs

Conclusion

As we increasingly prioritise low-energy and low-embodied carbon designs, structural insulated panels have emerged as a game-changer in the construction industry. Offering enhanced thermal performance, accelerated construction timelines, and versatile design possibilities, SIPs provide a compelling alternative to traditional build methods. By understanding the pros and cons, collaborating with experienced professionals, and applying best practices, architects can harness the full potential of SIPs to create sustainable, energy-efficient, and beautiful buildings.

If you would like to talk through your project with the team, please do get in touch at mail@risedesignstudio.co.uk or give us a call on 020 3290 1003

Contact us

RISE Design Studio Architects company reg no: 08129708 VAT no: GB158316403 © RISE Design Studio. Trading since 2011.