Single and double storey extensions in Brixton. Trusted, professional, 30+ years' hands-on experience.
GS Renovation builds extensions across Brixton, working with the side returns, rear closet wings and tight urban plots typical of SW2's Victorian and Edwardian terraces. With over 30 years in Lambeth, we take your extension from foundations and steelwork through roof and full fit-out, and we tell you clearly whether it is permitted development or needs planning permission.

The side return, that narrow strip of yard beside the rear closet wing, is the classic space to claim on a Brixton terrace. Infilling it widens a cramped galley kitchen into a full-width kitchen-diner that runs across the back of the house. We dig new foundations to suit the ground, tie into the existing wall carefully and install a steel beam where we open up the old external wall.
Many side-return and modest rear extensions on SW2 terraces fall under permitted development, but that is never guaranteed. If your home sits in a conservation area, has been extended before or you want a larger footprint, you may need a full planning application to Lambeth Council. We assess your permitted development rights at the outset, prepare drawings and, where required, manage the planning submission so you know exactly where you stand.
A double storey rear or wrap-around extension adds a bigger kitchen below and a bedroom or bathroom above, a popular way to gain space on Brixton's family terraces without moving away from Brockwell Park and Clapham Common. These schemes usually need a full planning application, deeper foundations and heavier steelwork. We coordinate the engineer, the ground works and the roof so the new floor sits true and the elevations match the existing brick.
Because these terraces share party walls with both neighbours, a double storey build almost always triggers the Party Wall Act, and excavating near the boundary needs formal notices too. We handle the party wall process alongside the building regulations approvals, keeping neighbours informed. Once the shell is watertight, the same team fits it out completely, plastering, joinery, kitchen, bathroom, electrics and heating, so you deal with one contractor from the first dig to the last coat of paint.
Homeowners across Brixton choose GS Renovation because we manage the whole extension, structural design, foundations, steel, roof and fit-out, under one roof. We are honest from day one about whether your project is permitted development or needs a Lambeth Council application, we handle party wall notices with neighbours, and 30+ years in SW2 means we understand exactly how these terraces are built.
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great attention to detail. I've already recommended him to others.
Splendid job on our new kitchen refurb, including new flooring, moving the services, installing RSJ and preparing space for new back doors… George was always friendly, communicative and has an excellent attention to detail, ensuring everything is finished to a high standard.
Giorgio is an excellent and intelligent workman, and with very reasonable prices!… He paid a lot of attention to detail that is not common at all, and the final result was immaculate. Highly recommended!
FAQ
Pricing house extensions in Brixton comes down to the size of the job, the specification you choose and the condition of the property. Rather than guess, we survey and give you a fixed, itemised quote you can rely on. Call 07472 424 226. As a rough guide, house extensions in London typically starts from roughly £40,000 for a single-storey rear extension and rises with size and specification (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.
Most house extensions projects in Brixton take between two and eight weeks depending on the scope and whether structural work is involved. We provide a clear programme before work begins so you know exactly what to expect.
GS Renovation knows Brixton's homes and how to renovate them properly. We handle the structure, the services and the finishes, deal with building control for you, and leave you with work that is certified, guaranteed and built to last.
Many single-storey rear extensions in Brixton fall under permitted development, but side returns, double-storey extensions and work in conservation areas usually need full planning permission. We assess your property and manage both the planning application and building control.
Yes. A large share of Brixton's homes are Victorian and Edwardian terraced properties, and we renovate them regularly. We plan each house extensions around their particular characteristics, such as solid brick walls, rear closet wings, side returns and original period features, so the result suits the building and meets building control.
It depends on the property. Many single storey rear and side-return extensions in SW2 are permitted development, but conservation area status, previous extensions or a larger footprint can require a full planning application to Lambeth Council. Double storey schemes almost always need permission. We check your rights before design work starts and manage any application on your behalf.
Yes, Brixton is one of our core areas. We work on every street and the SW2 area and across the wider South London, so wherever your home is, call 07472 424 226 and we will confirm we can help.
Every Service, One Team
The same trusted team, 30+ years' hands-on experience and free, no-obligation quotes apply to every GS Renovation service in Brixton. Explore what else we do locally:
Steel beam installation, RSJ and structural alterations.
Safe load-bearing wall removal with steel beam support.
Structural alterations, new openings and steel support.
Chimney breast removal with gallows bracket or beam support.
Open-plan kitchen, diner and living conversions.
Full refurbishments and whole-house renovations.
Bespoke kitchen design and installation.
Luxury bathroom and wet-room refurbishment.
Same Service, Nearby Areas
We carry out house extensions across Brixton and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Brixton.
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