Single and double storey extensions in Wimbledon. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions across Wimbledon, from side-return infills on SW19 terraces to full rear and wrap-around additions near Wimbledon Common. With more than 30 years working on the borough's Victorian and Edwardian housing, we handle foundations, steelwork, roofing and fit-out as one accountable project for families in Merton.

The bay-fronted terraces around Wimbledon typically have a rear closet wing and a narrow side return running alongside the kitchen. Infilling that side return, often combined with a rear extension, is the classic SW19 project. It widens a pinched galley kitchen into a proper open-plan kitchen-diner, floods the back of the house with light through rooflights and glazed doors, and opens onto the garden without losing much outdoor space.
We start with foundations and groundworks suited to the ground and any nearby trees, then bring in steel beams to carry the existing rear wall and the new roof. Because these terraces share boundaries, a party wall agreement with the neighbour is usually needed. We manage the excavation, the steel, the roof and the internal opening-up so the new and old parts read as one continuous space.
Not every Wimbledon extension needs a planning application. Many single-storey rear and side-return projects fall under permitted development rights, provided they stay within the limits on depth, height and materials. Double-storey extensions, work on the front elevation, and homes in conservation areas or that are listed usually do need a full application to Merton Council, and permitted development rights can be restricted in some parts of SW19.
We assess your specific property before drawing anything, because the right route depends on your plot, your neighbours and whether local rights have been removed. Whichever path applies, the structural elements must still meet building regulations, which is separate from planning. We prepare the drawings, submit to Merton Council where required, arrange building control inspections and see the whole extension through to a finished, decorated fit-out.
GS Renovation gives Wimbledon homeowners a single team for the entire extension: foundations, steel, roof, party wall coordination and the full internal finish. We are straight about whether your project is permitted development or needs a Merton Council application, we build to building regulations, and 30+ years in SW19 means fewer surprises on these period terraces.
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
There is no fixed price for house extensions in Wimbledon, because so much depends on your property and what you want to achieve. We survey first, then provide a transparent written quotation. Contact GS Renovation on 07472 424 226 for a free estimate. 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 Wimbledon 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.
With more than three decades of hands-on trade experience behind us, GS Renovation is a trusted choice for house extensions in Wimbledon. You get one accountable team, transparent pricing, fully insured tradespeople and genuine aftercare on every project.
Many single-storey rear extensions in Wimbledon 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 Wimbledon'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.
Often it will not. Many single-storey side-return and rear extensions in Wimbledon qualify as permitted development if they stay within the size and height limits. However, if your home is in a conservation area, is listed, or has had its permitted development rights removed, you will need a full application to Merton Council. We check your property first and take whichever route applies.
We cover the whole of Wimbledon and the SW19 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 Wimbledon. 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 Wimbledon and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Wimbledon.
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