House extensions – Wraparound extension
London architect guide
Wraparound Extensions in London
A wraparound extension, combining a side return and a rear extension, offers one of the most effective ways to create light-filled, open-plan living space in your London home.
For terraced and semi-detached properties, especially in densely built areas, a well-designed wraparound extension allows you to rethink the entire ground floor adding floor area, improving flow, and connecting to the garden in a way that reflects your lifestyle.
At GOAStudio architects, we’ve delivered wraparound extensions across a wide range of London boroughs, from conservation properties in Haringey and Camden to modern homes in Wandsworth and Redbridge.
This guide answers the most common questions homeowners ask when planning a wraparound extension with insights tailored to London homes, planning policy, and practical design.
FOR ADDITIONAL ADVICE SEE THE FOLLOWING RESOURCES FOR YOUR HOME PROJECT
Royal Institute of British Architects (RIBA)
- Do I need an architect for my extension or home project?
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Planning Portal
Putney Wandsworth SW15 House extensions full renovation – Light and rooflight
Roof and kitchen house extension Kingston KT2 – Roof forms
Arnos Grove N11 bungalow house extension green renovation by GOAStudio architects Kitchen island unit and external views
Kitchen extension Highgate Conservation Area N6 House renovation and contemporary design by GOAStudio architects – Side light rear light
Top 10 Tips for Planning a Wraparound Extension
- Get clear on your goals – what’s not working in your current layout?
- Consider phasing and allow time for it: can part of the project be built under Permitted Development?
- Explore glazing options to avoid creating dark interiors.
- Think about furniture placement early in the design.
- If the kitchen is relocating, where will the new plumbing run?
- Check party wall implications for the neighbours on both sides.
- Allow time for approvals especially in Conservation Areas.
- Don’t forget storage – many wraparounds could include clever utility space.
- Use a fixed-fee consultation to explore options before committing.
- Invest in comfort – the placement of the rooflights, insulation and ventilation matter more than size.
GOAStudio London residential architecture
George Omalianakis, BA (Hons) B.Arch Pg Dip Environmental Design.
Chartered RIBA architect and ARB registered.
RIBA Conservation Registrant specialism in conservation areas, period and Listed buildings.
Residential expert contributor for magazines including Which? magazine and Ideal Home.
Last reviewed by George Omalianakis for GOAStudio: August 2026
Can my property support a wraparound extension?
A wraparound extension works best when your home has both:
– A narrow side return that can be reclaimed from underused space
– Sufficient rear garden depth to allow a rearward projection
For many Victorian and Edwardian London homes, this layout is ideal. That said, not every property can accommodate a wraparound extension.
We begin every project with a desktop feasibility review or a home consultation to assess:
– Site boundaries and orientation
– Potential light loss to neighbouring properties
– Existing extensions nearby (important for precedent)
– Party wall and access constraints
Even small wraparound extensions can unlock dramatic internal improvements because the shape and proportion of the added space often matter more than the size of the added space.
What planning restrictions affect wraparound extensions?
Wraparound extensions typically require full planning permission, as they combine two forms of development. Key considerations for planning approval in London include:
– The 45-degree rule (impact on neighbouring windows)
– Roof height, pitch and materials
– Proximity to boundary walls
– Conservation Area or Article 4 Direction status
Most boroughs discourage overly deep rear extensions or tall flank walls on the boundary.
At GOAStudio architects, we will research the planning precedents in your area to design a wraparound extension that feels generous internally, yet remains sensitive externally increasing your chances of obtaining planning approval.
How much does a wraparound extension cost in London?
Wraparound extensions in London typically cost between £3,000 and £4,500 per square metre depending on design complexity, material choices, structural alterations required, and internal fit-out. As a guide:
– A small wraparound (20–25m²) might cost £70,000–£100,000+
– A large wraparound (35–45m²) can range £110,000–£160,000+
This excludes kitchen units, flooring, VAT and professional fees.
A key benefit of wraparound extensions is spatial efficiency, meaning that you can achieve a large-feeling space even on a modest footprint. We help shape your brief to ensure every square metre delivers value and comfort.
How long does a wraparound extension take to design and build?
From first consultation to completed build, you should allow 9–12 months:
– 1–2 months: measured surveys, initial design and feedback
– 2 months: planning permission
– 1 month: structural design, party wall notices, tendering
– 4–6 months: on-site construction
The construction phase includes demolition, excavation, structural steelwork, weatherproofing, first and second fix services, and final decoration.
We’ll create a tailored programme and guide you through each step from start to completion.
Can I live in my home during the wraparound extension works?
Yes, although it depends on the scope. Wraparound extensions typically affect the rear of the home, including the kitchen, so temporary cooking and utility solutions are often needed unless you are prepared to live on takeaway meals during most of the construction stage.
We advise clients to liaise with the Contractor on:
– Temporary partitions and dust barriers
– Portable kitchens or laundry facilities
– Phasing options for structural work
In some cases, it may be more efficient and cost-effective to temporarily relocate, especially if you have young children, allergies, or remote working needs.
We’ll discuss what makes the most sense for your project and your family and we will make sure that the Contractor plans around your requirements.
How will a wraparound extension improve the layout of my home?
The magic of a wraparound extension is in how it reshapes your entire ground floor. Most projects aim to:
– Open up the kitchen, dining and living into one light-filled space
– Add a utility or cloakroom zone out of sight
– Improve connection to the garden
– Create clear sightlines and better circulation
We use layout sketches, 3D visuals and zoning diagrams to help you test how the space will feel and function.
And we will then translate your requirements in planning and construction drawings and specifications.
How much value does a wraparound extension add?
A high-quality wraparound extension can add £100,000 to £150,000+ in property value, depending on location and execution.
It can also make your home far more desirable to future buyers by improving:
– Kitchen size and flow (a top buyer priority)
– Natural light and indoor-outdoor connection
– Storage, function and lifestyle flexibility
We advise our clients to obtain advice from estate agents on how to balance cost, layout, and resale value so your investment works both now and in the future.
Can I build a wraparound extension under permitted development?
In most cases, a full wraparound extension will not fall under Permitted Development (PD) rights, because the side element exceeds the scope of what’s allowed.
Rear extensions up to 3m (terraced) or 4m (detached) may be possible under PD but the wraparound portion requires planning approval.
Some clients choose to build the rear extension under PD and then seek planning approval for the side return later.
We’ll advise on whether that strategy is worthwhile and whether your site qualifies for a Lawful Development Certificate that will confirm compliance with the relevant requirements.
Request a free Feasibility Review
If you're not quite sure what’s possible, or whether now’s the right time, we can help you make an informed start.
Send over your address, a few photos, and a short outline of what you're hoping to achieve.
We’ll take a look at your site context, planning history, and potential constraints and respond with early advice tailored to your home and circumstances.
Email us with the subject “Feasibility Review” or send us your information through our Contact us page.
Book a Home Consultation
It is the ideal first step if you are planning works to your home or if you are in the middle of purchasing a property in need of renovation.
George will visit the property to understand its character, how you use the space day to day, and offer advice on all relevant design and other matters.
You will come away with a clear sense of your next steps and greater confidence to make informed decisions. The consultation (2hrs, £250 +VAT) is a standalone service with no obligation to proceed.
Visit our Contact us page to book.
Not sure where to start with your renovation or extension?
Read this before you meet an architect, speak to a builder or spend money on drawings.
This free, architect-prepared guide walks you through the 15 essential questions every homeowner should ask before starting a project.
"Should we renovate, extend… or walk away?
15 Questions every London homeowner must ask before starting a project to include homes in Conservation Areas and Listed Buildings."
Whether you're planning a modest rear extension or major alterations to a listed home, it will help you avoid expensive mistakes and give you clarity on what’s possible for your property. Includes guidance on:
Planning approvals. Conservation areas.
Timelines and costs. Appointments you need to make.
Design and sustainability options.
When to press ahead and when to walk away
We provide architectural services for residential projects in the following London Boroughs:
Barnet, Camden, Enfield, Hackney, Hammersmith and Fulham, Haringey, Islington, Kensington and Chelsea, Lambeth, Lewisham, Newham, Tower Hamlets, Waltham Forest, Wandsworth, Westminster
We specialise in
- Greener homes
- Retrofit and energy efficiency for older and traditional buildings
- Conservation areas
- Listed Buildings
- Homeowner architectural services
- Property developments architectural services
GOAStudio London residential architecture limited.
86-90 Paul Street, EC2A 4NE, Hackney
Chestnut Avenue South, E17 9EJ, Waltham Forest
t: 0203 984 3005
