Single and double storey extensions in Fulham. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions throughout Fulham, working with the bay-fronted Victorian and Edwardian terraces that fill SW6. With over 30 years across the borough, we handle everything from a side-return infill near Parsons Green to a full wrap-around near Bishops Park, managing foundations, steel, roof and fit-out under one roof.

The most requested Fulham extension is the side-return infill, filling the narrow alley beside the rear closet wing to widen a cramped galley kitchen into a bright kitchen-diner. On wider plots we add a full-width rear extension, and on some SW6 corner and end-of-terrace houses a wrap-around that combines both. Each needs new foundations, steel beams over the openings and a carefully detailed roof, often with rooflights to bring daylight deep into the plan.
We start with the groundworks and foundations, checking for drains and the shared boundary before we dig, then build up in brick or blockwork to match the existing house. The old rear wall usually comes out on a steel, tying the new space to the original reception rooms. We finish with insulation, glazing, plastering and the full internal fit-out so the extension is ready to use.
Whether your Fulham extension is permitted development or needs a full planning application depends on the property. Many single-storey rear extensions fall under permitted development, but if your home has been extended before, sits in a conservation area or you want a larger or double-storey build, you will need permission from Hammersmith and Fulham Council. We assess your specific house before design so you know which route applies.
Separate from planning, every extension must meet building regulations, and building control inspects the foundations, steel, insulation and drainage as the work proceeds. Because SW6 terraces share boundaries, extensions along or near the party wall trigger Party Wall Act notices to neighbours. We coordinate the planning route, the building control inspections and the party wall process so nothing stalls the programme.
Fulham homeowners choose GS Renovation because one team takes the extension from foundations to final decoration. We know the SW6 terrace, its closet wing, its side return and its shared boundaries, and we manage the council planning route, building control together. With 30+ years locally, we deliver tidy, structurally sound extensions that work for the way you live.
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great…
George always kept to commitments and arrived on time. He offered helpful suggestions during his initial visit and promptly provided a reasonably…
Giorgio is an excellent and intelligent workman, and with very reasonable prices! He installed a kitchen extractor fan in a complicated situation…
FAQ
As accurate as the information behind it. A house extensions figure given over the phone for a Fulham home will move; one written after we have looked carefully at the SW6 property usually does not. GS Renovation allows for the making good that bay-fronted Victorian terraced construction demands, and shows the Hammersmith and Fulham Council element separately. That is why our Hammersmith and Fulham quotations tend to hold. Ring 07472 424 226 to book the free survey at your SW6 address. 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.
Earlier than you probably think, particularly if there is a deadline. House extensions at an SW6 property may need an engineer's design and Hammersmith and Fulham Council approval before the Fulham start date, and those steps come first. GS Renovation runs them in parallel to save time. Email info@gsrenovationltd.co.uk with the Hammersmith and Fulham address and we will book a visit. Ring 07472 424 226 and GS Renovation will tell you honestly when the next genuine Fulham slot actually is.
One accountable team, full insurance, and no surprises on the invoice. GS Renovation carries out house extensions at your SW6 address with its own people, agrees any variation in writing first, and hands over the Hammersmith and Fulham Council completion certificate at the end. That document matters when a Fulham property is sold. Free quotes and no obligation apply across Hammersmith and Fulham. Email info@gsrenovationltd.co.uk and we will arrange a visit. The Hammersmith and Fulham certificate is yours at completion.
Many single-storey rear extensions in Fulham fall under permitted development, but side returns, double-storey extensions and work in conservation areas usually need full permission. We assess your SW6 property and manage both the Hammersmith and Fulham Council application and building control.
Mainly that investigation comes before commitment. House extensions at an SW6 property of that age can meet altered structure, aged timber or previous work that was never signed off, so GS Renovation opens up carefully and confirms before pricing the Fulham job. An engineer is appointed where the design needs one. Hammersmith and Fulham Council inspects the structural stages in the usual way. GS Renovation will explain on 07472 424 226 what house extensions involve in an SW6 house of that age.
It depends on your house. Many single-storey side-return and rear extensions in Fulham are permitted development, but if your terrace has already been extended, sits in a conservation area, or you want a larger footprint, you will need a planning application to Hammersmith and Fulham Council. Either way the build must meet building regulations, and we confirm the right route before design begins.
No. There is no travel surcharge for house extensions at an SW6 address, and none anywhere else in Hammersmith and Fulham. GS Renovation prices the work rather than the journey, which is why two similar Fulham properties get similar quotations. The survey costs nothing either. Ring 07472 424 226 and we will confirm before you commit. Mileage has never appeared as a line on our quotations. Two similar SW6 homes in Hammersmith and Fulham would receive entirely comparable figures.
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 Fulham. Explore what else we do locally:
Same Service, Nearby Areas
We carry out house extensions across Fulham and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for house extensions in Fulham. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.