Single and double storey extensions in Richmond upon Thames. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions across Richmond upon Thames, from riverside homes near the Thames to period cottages in Barnes and Teddington. With over 30 years working on the borough's Georgian, Victorian and listed stock, we handle groundworks, steel, roofing and fit-out, guiding you through permitted development or a full planning application to Richmond Council.

The side-return extension is a favourite in Richmond's Victorian terraces, infilling the narrow alley beside the rear closet wing to widen a cramped kitchen into an open-plan kitchen-diner. We dig and pour foundations to suit the ground and any nearby trees, then install a steel frame where original walls come out. A glazed roof or rooflights bring light deep into a plan that period houses often leave dark at the centre.
Rear extensions suit the larger plots found around Kew and TW10, adding a full-width room across the back of the house. Wrap-around designs combine both, though on tighter Twickenham plots we plan carefully around boundaries and party walls. Whether the project falls under permitted development or needs planning permission depends on size, height and whether the property is listed or in a conservation area, which is common across this borough.
Not every Richmond upon Thames extension needs planning permission. Many single-storey rear extensions fall within permitted development rights, but those rights are removed or restricted for listed buildings and in conservation areas, both of which are widespread across TW1, TW9 and TW10. We assess your property early and, where required, prepare and submit a full application to Richmond Council, managing the drawings and the process so you know where you stand before we build.
Because the borough's terraces and semis share boundaries, extensions frequently trigger the Party Wall Act. Excavating near a neighbour's foundation or building up to the line means serving notice before work starts. Alongside planning, the build itself needs building regulations approval covering foundations, insulation, structure and drainage, all inspected by building control. We fold these approvals into one programme so the groundworks, steel and roof progress without stalling on consents.
Richmond homeowners choose GS Renovation because we run the whole extension in-house, from foundations and steelwork to the final decoration. We know the borough's period and listed stock, its conservation constraints and Richmond Council's expectations, so nothing surprises you mid-build. With 30+ years behind us and one team accountable throughout, you get honest advice on planning, tidy working and a lasting result.
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great…
We loved working with George and Ibrahim and would highly recommend them. They have done splendid job on our new kitchen refurb which including new…
Punctual, worked hard, and did exactly what he was asked and what he said he would do. Overall, a very high quality job. Will use again.
FAQ
Location itself is not a line on our quotation. Two South West London homes of the same age and construction get similar house extensions figures, and what separates them is condition and access at the TW1 address. GS Renovation does not charge Richmond upon Thames homeowners a premium for the address, and there is no travel surcharge within Richmond upon Thames. The survey establishes the rest. Ring 07472 424 226 with the TW1 postcode and we will confirm before quoting. 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 tell you exactly, once we have seen the house. Guessing a house extensions duration for a Richmond upon Thames property without a survey helps nobody, and the TW1 visit is free. GS Renovation then issues a staged programme including the Richmond Council inspection dates and the drying time that cannot be rushed. That is the version to plan a Richmond upon Thames household around. Ring 07472 424 226 and we will describe how a similar TW1 job ran in Richmond upon Thames.
The work area is separated from the rest of the house before anything starts. On a house extensions job at a TW1 address GS Renovation seals openings, protects floors and stairs, and clears debris daily rather than at the end of the Richmond upon Thames project. Materials are stored tidily and the street is kept clear. Neighbours in a Richmond upon Thames terrace notice the difference immediately. Ring 07472 424 226 to discuss access. Neighbours in Richmond upon Thames terraces notice the TW1 difference immediately.
Permitted development allows building up to the boundary at single storey, subject to height limits at the eaves, but foundations near a neighbour's structure engage the Party Wall Act. On a Richmond upon Thames plot we check both the planning route and the party wall position before design.
Not problems so much as variables, and they are manageable when found early. House extensions in a TW1 property of that age can meet irregular structure or earlier alterations, which is exactly what the Richmond upon Thames survey is for. GS Renovation prices what is visible and names what is not. Anything discovered later is agreed in writing before we continue. Ask on 07472 424 226 what house extensions at a TW1 address in Richmond upon Thames actually involves in practice.
It depends on your property. Many single-storey rear extensions qualify as permitted development, but those rights are commonly restricted or removed for listed buildings and homes in Richmond's conservation areas. We assess your address first, then either build under permitted development or prepare a full planning application to Richmond Council. Either way, the structure still needs building regulations approval.
There is no part of Richmond upon Thames we would exclude. House extensions are carried out throughout the area and the TW1 area and across neighbouring Richmond upon Thames, on terraces, semis and flats alike. GS Renovation knows how stucco-fronted townhouses and early Victorian villas with deep basements are built, which is what makes a TW1 quotation accurate. Email info@gsrenovationltd.co.uk and we will book a free survey. Building control goes through Richmond Council in the usual way. Small jobs and whole-house programmes are both quoted on the same basis.
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 Richmond upon Thames. Explore what else we do locally:
Same Service, Nearby Areas
We carry out house extensions across Richmond upon Thames and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for house extensions in Richmond upon Thames. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.