Single and double storey extensions in Hammersmith and Fulham. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions throughout Hammersmith and Fulham, adding space to bay-fronted Victorian and Edwardian terraces in W6, W12, W14 and SW6. With more than 30 years in West London, we handle single and double storey, rear, side-return and wrap-around extensions from foundations to final fit-out.

The classic project on the borough's terraces is the side-return extension, filling the narrow strip of dead ground beside the rear closet wing to widen a cramped galley kitchen into a bright, open-plan kitchen-diner. Off the streets around Parsons Green and Fulham, this transforms how a Victorian house lives, and we often combine it with a rear extension to create a full wrap-around footprint opening onto the garden.
We dig and pour the foundations, build the walls, install the steel beams that carry the old rear wall, and form a roof with rooflights or a glazed lantern to pull daylight deep into the plan. Groundworks near the Thames in SW6 can meet higher water tables, so we adapt the foundation design to the ground conditions we find on site.
Many rear and side-return extensions on these terraces fall under permitted development, but not all do. Corner plots, flats, homes in a conservation area and anything beyond the permitted size limits need a full planning application to Hammersmith and Fulham Council. We assess your property early and tell you clearly which route applies, then prepare drawings and manage the submission so you are not left guessing.
Whichever planning route you take, the structural work is signed off separately under building regulations by building control. Because you are extending against a shared boundary, party wall notices to neighbours are almost always needed on these closely spaced streets. We coordinate planning, party wall matters, building control and the full fit-out, including kitchen, bathroom, electrics and decoration, as one managed project.
GS Renovation gives Hammersmith and Fulham homeowners a single team for the whole extension, from foundations and steelwork to planning submissions, party wall notices and finishing. We know how the borough's terraces, closet wings and side returns behave, and we know what Hammersmith and Fulham Council expects. Thirty years of West London builds means fewer surprises and a properly certified result.
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 Hammersmith and Fulham 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.
We will give you an honest timescale for house extensions in Hammersmith and Fulham after surveying your home. Most projects run on a clear weekly programme, and we tell you up front about any lead times on materials or approvals.
Because we manage every trade in-house, your Hammersmith and Fulham project stays consistent and accountable from first fix to finish. Add transparent pricing, full insurance and real aftercare, and it is easy to see why Hammersmith and Fulham clients recommend us.
Many single-storey rear extensions in Hammersmith and Fulham 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 Hammersmith and Fulham'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 side-return and rear extensions on Hammersmith terraces are permitted development, but flats, conservation area homes, corner plots and larger designs need a planning application to Hammersmith and Fulham Council. We check your specific property first, confirm the route, and handle the drawings, submission, party wall notices and building regulations sign-off so nothing is missed.
We do. GS Renovation covers all of Hammersmith and Fulham and the W6 area and the wider West London. Call 07472 424 226 and we will confirm we work on your road.
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 Hammersmith and Fulham. 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 Hammersmith and Fulham and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Hammersmith and Fulham.
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