Single and double storey extensions in Kew. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions across Kew, working with the bay-fronted Victorian and Edwardian terraces that define TW9 near Kew Gardens and the Thames. With 30+ years in the borough, we handle foundations, steel, roofing and full fit-out, and we tell you honestly whether your project is permitted development or needs a planning application to Richmond Council.

Kew terraces almost always have a narrow side return running alongside the rear closet wing, and filling it in is the single most transformative extension we build here. Infilling that strip, often combined with a modest rear extension, turns a cramped galley kitchen into a wide, light open-plan kitchen-diner. We dig proper foundations, allow for the neighbour's drains, and carry the existing wall on a steel beam sized by the engineer.
A wrap-around extension takes the side return and rear together for a larger footprint, while double-storey rear extensions add a bedroom or bathroom above. Whatever the scale, we manage groundworks, the steelwork, the flat or pitched roof with proper insulation, and the glazing, whether that is rooflights, bifold doors or a lantern, so the finished space suits the proportions of your period Kew home.
Some Kew extensions fall under permitted development, but many do not, and the difference matters. Parts of TW9 sit within conservation areas near the Gardens, and any listed building or work to the front elevation will need a full planning application to Richmond Council. We assess your specific address at the outset, advise on the likely route, and prepare or coordinate the drawings so there are no costly surprises once we start on site.
Because Kew houses are terraced, extensions frequently trigger the Party Wall Act where we build up to or astride a boundary, or excavate foundations near the neighbour's wall. We handle the notices and the timing, and separately we register the building regulations application so building control inspects the foundations, steel, insulation and drainage. Planning and building regs are two different approvals, and we manage both correctly.
Kew homeowners choose GS Renovation because we build extensions that respect the character of the terrace while adding real, usable space. One team runs the groundworks, steel, roof and fit-out, we are straight with you about permitted development versus a Richmond Council application, and we handle party wall matters along your row. That is 30+ years of local building experience.
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 Kew 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.
How long house extensions takes in Kew depends on the size of the job, but we always agree a programme before starting and stick to it, keeping you informed from the first day to the last.
Kew homeowners choose GS Renovation for reliability and quality. We are fully insured, building control compliant where needed, and bring over 30 years of hands-on experience to every house extensions project, with a single point of contact throughout.
Many single-storey rear extensions in Kew 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 Kew'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 and its location. Many rear and side-return extensions in Kew are permitted development within set limits, but conservation areas near Kew Gardens, listed buildings, and work to front elevations usually need a full application to Richmond Council. We check your exact address early, advise the correct route, and either way we register the building regulations application separately so the structure is inspected and signed off.
Absolutely. Our team works right across Kew and the TW9 area and neighbouring parts of South West London. Get in touch on 07472 424 226 to check coverage for your address.
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 Kew. 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 Kew and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Kew.
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