Single and double storey extensions in Muswell Hill. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions across Muswell Hill, working with the bay-fronted Victorian and Edwardian terraces that define N10. Over more than 30 years in Haringey we have infilled countless side returns, added rear extensions and built double-storey additions, handling the groundworks, steelwork, roof and full fit-out as one accountable project.

The side return that runs alongside the rear closet wing is the classic Muswell Hill opportunity. Infilling it widens a narrow Edwardian kitchen into a full-width room, and pairing that with a modest rear extension creates the open-plan kitchen-diner most N10 families want. We dig and lay foundations to suit the local clay subsoil, tie safely into the existing brickwork, and install the steel goalpost that carries the rear wall once it opens up.
Roof works follow, whether a flat roof with rooflights, a pitched tie-in, or a glazed lantern to pull light into the deeper plan. We keep the new brick and detailing sympathetic to the period elevation, then fit out the space completely with plastering, electrics, plumbing, flooring and decoration so you move straight back into a finished room.
Many single-storey rear and side-return extensions in Muswell Hill fall under permitted development, but that is never guaranteed. Larger footprints, double-storey additions and anything affecting the front or a protected elevation usually need a full planning application to Haringey Council. We assess your specific property first and tell you honestly which route applies, then prepare and submit the drawings rather than leave you to chase it.
Every extension also needs building control for the structure, foundations, drainage and insulation, which is separate from planning. And because these terraces sit against a shared party wall, excavating near it or building up to the boundary triggers Party Wall Act notices. We coordinate the notices, the council submission and the inspections so all three run in the right order.
Muswell Hill clients pick GS Renovation because we build extensions end to end, from the first foundation to the final coat of paint. We know how N10 terraces behave, when a job is permitted development versus a Haringey planning matter, and how to keep an occupied home liveable while we work. Thirty-plus years locally means fewer surprises and a tidier site.
He was very very good. He just got on with the job and we was beey pleased with the result. He Also cleaned everything away when he finished. Will…
Saiid did a complete refurbishment of our small bathroom. This involved ripping out the existing bath/shower, basin, toilet, pipework, and tiles and…
George was a great find. The job required re-plastering the walls before fitting acrylic panels. He also re-plumbed the shower waste under the solid…
FAQ
As accurate as the information behind it. A house extensions figure given over the phone for a Muswell Hill home will move; one written after we have looked carefully at the N10 property usually does not. GS Renovation allows for the making good that Victorian and Edwardian terraced construction demands, and shows the Haringey Council element separately. That is why our Haringey quotations tend to hold. Ring 07472 424 226 to book the free survey at your N10 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.
Usually a little, and the extra time is in the finishing rather than the structure. Bay-fronted Victorian and Edwardian terraces with rear closet wings and side returns rarely offer square openings or regular floors, so house extensions at an N10 address takes more care in plaster and joinery. GS Renovation allows for that in the Muswell Hill programme rather than announcing it later. The structural stage itself is broadly comparable across Haringey. Ring 07472 424 226 and we will explain what a Victorian and Edwardian terraced N10 property usually adds.
Enough to know where the problems hide in an N10 property before quoting. House extensions in Victorian and Edwardian terraced housing throws up variation that a modern estate does not, and 30 years of hands-on experience is what turns that into an accurate Muswell Hill figure rather than a cautious one. GS Renovation has been incorporated since 2023. The experience behind it is considerably older. Ask on 07472 424 226 about Haringey projects. References near N10 are given as addresses, not testimonials.
It can. The Community Infrastructure Levy applies above 100 square metres of new floorspace, though a residential extension to your own home usually qualifies for relief if it is claimed before work starts. Missing that claim is expensive, so we flag it early on Muswell Hill projects.
Yes, repeatedly. GS Renovation is on properties of that age across Muswell Hill and Tottenham most weeks, which is why a house extensions quotation for an N10 address is priced from experience rather than caution. References are available on request. Seeing a finished Haringey job in person tells you more than anything written down. References covering house extensions on Muswell Hill properties of exactly that age and type all follow on info@gsrenovationltd.co.uk request in Haringey.
It depends on the property. Many single-storey rear or side-return extensions in Muswell Hill are permitted development, but double-storey additions, larger footprints or work to protected elevations need a planning application to Haringey Council. Either way, the structure, foundations and drainage need building control. We assess your house, confirm the route, and handle both the council submission and the inspections.
We are on sites across Muswell Hill and Haringey most weeks, so yes. That proximity affects three practical things on a house extensions project: how fast the N10 survey happens, how well we know the Haringey Council process, and how quickly anyone returns afterwards. GS Renovation would rather be judged on those than on a postcode in an advert. Ring 07472 424 226 to check. References are available beforehand. The N10 survey costs nothing and commits you to nothing.
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 Muswell Hill. Explore what else we do locally:
Same Service, Nearby Areas
We carry out house extensions across Muswell Hill and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for house extensions in Muswell Hill. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.