Single and double storey extensions in Surbiton. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions across Surbiton, adding space to the bay-fronted Victorian and Edwardian terraces of KT6 without losing their character. With over 30 years working on period homes near Richmond Park and the Thames, we handle groundworks, steel, roof and fit-out as one managed project.

The single most popular project in Surbiton's terraces is filling in the side return, that narrow alley of wasted ground beside the rear closet wing. Widening the kitchen into this strip and pushing out at the rear turns a cramped galley into an open-plan kitchen-diner that runs the full width of the house. We dig and pour the foundations, tie the new walls into the existing Victorian brickwork and carry the load on a steel beam where the old outside wall comes down.
Double-storey rear extensions add a bedroom or bathroom above the new ground floor, which suits families staying put in KT6 rather than moving on. We match brick, pointing and roof detail to the original house so the addition reads as part of the terrace. Rooflights and glazing bring daylight deep into a plan that was previously dark at its centre, a common problem in these long, narrow properties.
Some Surbiton extensions fall under permitted development, while others need a full planning application to Kingston Council, and the difference depends on your specific property. Size, height, how far you project and whether the house sits in a conservation area or has been extended before all matter. We assess your terrace honestly, tell you which route applies and prepare the drawings and application when planning permission is genuinely required rather than assuming it always is.
Because Surbiton terraces share party walls, an extension that ties into next door's flank wall, or excavates foundations close to it, brings the Party Wall Act into play. We serve the correct notices and record a schedule of condition before we break ground. Separately, the structural elements, the beams and the foundations, are covered by building regulations and inspected by building control regardless of whether planning consent was needed.
Homeowners across Surbiton choose GS Renovation because one team carries the whole extension, from the first trial hole to the last coat of paint. We know how KT6 terraces are built, when Kingston Council planning is needed and when permitted development covers it, and how to keep a party wall neighbour onside. Over 30 years of period work stands behind every extension.
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
We price each Surbiton project individually, because the cost of house extensions depends on far more than floor area. After a free survey you receive a clear written breakdown with no hidden extras. Call 07472 424 226 or email info@gsrenovationltd.co.uk. 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.
Timescales for house extensions in Surbiton vary with the size and complexity of the job. After our survey we give you a realistic schedule and keep you updated at every stage of the project.
GS Renovation knows Surbiton'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 Surbiton 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 Surbiton'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 side-return and rear extensions in Surbiton are permitted development, but larger schemes, double-storey additions, or homes in a conservation area or already extended may need a full planning application to Kingston Council. We assess your terrace, confirm the route and handle the application if required. Either way, the foundations and steelwork need building regulations approval.
Yes. We work throughout Surbiton and the KT6 area, as well as the surrounding parts of South West London. Contact us on 07472 424 226 to confirm we cover your street.
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 Surbiton. 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 Surbiton and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Surbiton.
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