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 coordinate the work around the party wall award 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 very friendly and helpful from start to finish. He worked really hard to ensure our kitchen was installed to a high standard and was…
Very friendly and I am very pleased with the work he has done, also very clean worker and enthusiastic about his work. Can not fault this company!!!!…
What can I say!!! George is an extremely lovely man his workmanship is second to none, he has an excellent eye for detail and nothing was to much…
FAQ
It depends on the house, which is exactly why the survey comes first. In bay-fronted Victorian and Edwardian terraces with rear closet wings and side returns the reinstatement often outweighs the structural element of house extensions, whereas a newer TW9 property is the other way round. GS Renovation prices the two separately so a Kew client can see the balance. Phasing the work is then possible if the budget needs it. Ring 07472 424 226 and GS Renovation will talk through phasing options for a TW9 home. 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.
More weeks than the structural work alone suggests. Once the beam or the opening is in at your TW9 property, house extensions moves into plastering, decorating and sign-off, and that phase fills out the Kew programme. GS Renovation sets realistic dates rather than optimistic ones. Ring 07472 424 226 and we will give a range for a comparable late Victorian and Edwardian home in Richmond upon Thames. The Richmond Council inspection dates are marked on the Kew programme from the outset.
We tell you immediately, price the fix, and get your agreement before continuing. Problems on a house extensions job usually surface when a late Victorian and Edwardian TW9 property is opened up, and hiding them helps nobody. GS Renovation sets out the effect on the Kew programme and on the cost in writing. Work resumes once you have decided, not before. Ring 07472 424 226 to hear how Richmond upon Thames variations are agreed. Nothing at TW9 proceeds without your written approval in Kew.
Always, regardless of the planning route. Foundations, structure, insulation, drainage and ventilation are all inspected. GS Renovation submits the application to Richmond Council and books the inspections through to the completion certificate on your Kew project.
The large majority of it. Bay-fronted Victorian and Edwardian terraces with rear closet wings and side returns make up most of the housing around TW9, so house extensions on them is what GS Renovation does week in and week out rather than occasionally. That familiarity is why a Kew quotation is priced from experience. References across Richmond upon Thames are available on request. Email info@gsrenovationltd.co.uk and we will send addresses of several recent house extensions projects on properties of that age near TW9 in Kew itself.
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.
Local enough to know the housing, which matters more than the mileage. House extensions in a late Victorian and Edwardian Kew property needs a different approach from a new estate, and GS Renovation surveys the TW9 address on that basis. We are also close enough to return for snagging without it being an expedition. References across Richmond upon Thames are available. Email info@gsrenovationltd.co.uk and we will send them. Quotes are free and carry no obligation at TW9.
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:
Same Service, Nearby Areas
We carry out house extensions across Kew and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for house extensions in Kew. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.