Everything You Need To Know About Wraparound Extensions

RISE Design Studio | Extensions

Wraparound extensions are a fantastic way to add valuable living space, bring in natural light, and enhance the aesthetics of your home. In this guide, we’ll explore the key benefits, types of wraparound extensions, and essential considerations for planning and building one. Whether you’re aiming to expand your home or update its look, a wraparound extension offers a versatile and impactful solution.

What is a Wraparound Extension?

A wraparound extension creates additional living space by combining two types of extensions:

1. Side Infill Extension – Encloses the area between the side of a projecting outrigger and the boundary wall.
2. Rear Extension – Adds space to the back of the outrigger.

Together, these form an L-shaped design that ‘wraps around’ the existing structure, significantly increasing usable space.

Costs of A Wraparound Extension

1. Amount of New and Refurbished Space

Integrating the new extension with the existing ground floor often requires reconfiguring layouts. On average, clients should budget £2,500 - £3,500 + VAT per square metre for construction, including finishes, fixtures, and fittings.

2. Structural Work

Removing supporting walls and replacing them with structural solutions (e.g., steel or engineered timber) is necessary to merge old and new spaces. Costs vary based on the level of demolition and structural complexity. Strategic design, such as including structural posts, can optimize both space and budget.

3. Specification Levels

Specification choices can have a significant impact on costs. Prioritise high-value elements like flooring, glazing, or lighting that enhance the overall design and experience.

4. Glazing Ratio

Glazing can dramatically influence cost and ambiance. Whether you opt for large glass panels or a more understated approach, consider how glazing enhances natural light and connects indoor spaces with the garden.

Do You Need Planning Permission?

Yes, planning permission is required for wraparound extensions. While individual components (side infill and rear extensions) may fall under permitted development, their combination typically exceeds these allowances.

Timelines for a Wraparound Extension

• Design and Planning: Allow approximately 8 weeks for planning approval.
• Construction: Expect a 4–6 month build phase, depending on the complexity of the project and the contractor’s expertise.

Benefits of a Wraparound Extension

• Maximises floor space while preserving outdoor areas.
• Utilises underused side alleys or pathways.
• Enhances connection to the garden.
• Brings more natural light into your home.
• Creates space for functional rooms like playrooms, utility spaces, or additional WCs.
• Opens up and transforms kitchen or living areas.

These advantages make wraparound extensions particularly popular in urban areas where every square metre counts.

How to Find the Right Architect

A successful wraparound extension begins with a skilled architect. Start by preparing a detailed brief outlining your goals, constraints, and budget. Shortlist architects based on their experience and expertise in similar projects. Finally, establish clear communication and expectations to ensure a smooth collaboration.

Need help finding the right architect? Check out our detailed guide to choosing an architect.

At RISE Design Studio, we specialise in creating sustainable, innovative, and tailored designs that enhance the way you live. Contact us today to discuss your vision for a wraparound extension.