Single and double storey extensions in Tooting. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions across Tooting, adding space to the bay-fronted Victorian and Edwardian terraces that fill SW17. With over 30 years in Wandsworth, we handle everything from a single-storey rear extension over the closet wing to a full side-return infill and double-storey addition, groundworks through to fit-out.

The side-return infill is the signature Tooting extension. These terraces have a narrow strip of yard running alongside the rear closet wing, and filling it in widens a cramped galley kitchen into a generous open-plan room. We dig new foundations next to the existing wall, build up in matching brick, and tie a glazed or solid roof into the original slope. A steel beam usually replaces the old rear wall to open the two spaces into one.
Many single-storey rear and side-return extensions in Tooting fall under permitted development, but that is not guaranteed. Whether your project needs a full planning application to Wandsworth Council depends on its size, the position on the plot and whether the property sits in a conservation area or has had permitted development rights removed. We assess this at the start, prepare the drawings, and submit either a lawful development certificate or a planning application as needed.
Where the plot allows, we build double-storey rear extensions on Tooting terraces, adding a larger kitchen below and a bedroom or bathroom above. These almost always need a full planning application to Wandsworth Council, because a two-storey addition changes the rear elevation and affects neighbouring light. We manage the design, the engineer's calculations and the submission, then build deeper foundations to carry the extra load and integrate the new roof and gutters with the existing terrace.
Building up and out against a neighbour brings the Party Wall Act into play, especially where foundations sit close to the boundary or the new structure ties into the shared wall. We serve the notices, agree the awards and keep the neighbours informed, which matters on Tooting's close-set streets. Once the shell is watertight we complete the full fit-out, plastering, heating, electrics and decoration, so you move back into finished rooms rather than a bare structure.
Tooting families choose GS Renovation because we build the whole extension with one team, from the foundations and steel to the planning submission and final decoration. We know how SW17 terraces are put together, we handle Wandsworth Council and party wall matters for you, and we keep the house liveable while we work. Over 30 years locally means fewer surprises.
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
Every Tooting project is priced on its own merits, as the cost of house extensions varies with the size, specification and condition of the home. We give a clear, itemised quote up front with no obligation. Call 07472 424 226 for an estimate tailored to your property. 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.
We will give you an honest timescale for house extensions in Tooting after surveying your home. Most projects run on a clear weekly programme, and we tell you up front about any lead times on materials or approvals.
GS Renovation knows Tooting'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 Tooting 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 Tooting'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 Tooting qualify as permitted development, but size limits, plot position, conservation area status and any removed rights can push you into a full planning application to Wandsworth Council. We check your specific address at the outset and handle either a lawful development certificate or a planning submission for you.
We cover the whole of Tooting and the SW17 area and the surrounding South West London. If you are nearby and not sure, just call 07472 424 226 and we will tell you straight away.
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 Tooting. 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 Tooting and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Tooting.
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