Single and double storey extensions in Haringey. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions across Haringey, from side-return infills in Muswell Hill to rear extensions in Wood Green and Tottenham. With more than 30 years working on the borough's bay-fronted Victorian and Edwardian terraces, we handle the groundworks, steelwork, roof and full fit-out as one accountable project in N4, N8, N10, N15, N17 and N22.

The most popular extension on Haringey's terraces fills the side return, the narrow strip of yard beside the rear closet wing, to widen a cramped galley kitchen into a bright kitchen-diner. We dig and pour the foundations, tie the new structure into the existing solid-wall build, install the steel beams that carry the old rear wall, and finish with a flat or pitched roof and roof lights that pull daylight deep into the plan.
Wrap-around extensions combine the side return with a rear projection for families in N8 and N10 who want a genuine open-plan ground floor. On these tighter terraced plots we plan the drainage runs, the party wall interface and the tie-ins carefully, because there is little room for error between your house and the boundary. Every element, from groundworks to the final skirting, is handled by our own team.
Many single storey rear extensions in Haringey fall under permitted development, meaning you can build within set size and height limits without a full planning application. But it is never automatic. Homes in a conservation area, flats, and anything beyond the permitted limits will need a planning application to Haringey Council, and larger rear projections may require the prior approval neighbour consultation route before you can start.
We assess your specific property early, because a terrace near Alexandra Palace or in one of Crouch End's conservation areas is treated differently from a house with full permitted development rights. Whichever path applies, the structural work still needs building control approval under the Building Regulations, and where the extension meets the shared party wall we coordinate the work around the party wall award to the neighbour as part of the job.
Haringey homeowners choose GS Renovation because one team takes the extension from foundations to finish, so there is no gap between builder, roofer and fit-out trades. We advise honestly on whether your project is permitted development or needs a planning application, manage building control and party wall matters, and draw on 30+ years of building extensions on the borough's period terraces.
My husband and I are extremely pleased with the work. The standard of the work is outstanding and Saiid has a great eye for detail and will not leave…
Really great job done in our bathroom to replace the shower head in the bathtub, and install a shower screen and caddy. We are very happy with the…
Built a new extension at rear of property. Laid foundations, drainage, raised floor, new roof and completed all fixtures and interior decoration…
FAQ
A rough steer yes, a quotation no. Ring 07472 424 226 or email info@gsrenovationltd.co.uk and we will describe how house extensions normally runs in Haringey, including the Haringey Council approvals involved. The figure itself waits until the N4 property has been seen, because bay-fronted Victorian terraced construction rarely matches the assumption. That is what keeps a GS Renovation quotation accurate. Nothing at all is owed for the N4 survey, and the written Haringey figure follows within days. 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.
Modern stock is usually faster to finish. Where house extensions are concerned the difference shows after the structural stage, because a bay-fronted Victorian terraced Haringey property needs far more reinstatement around the N4 works. GS Renovation allows for that difference in the programme it issues. Both types are surveyed the same way in Haringey before any dates are committed. Ask GS Renovation on 07472 424 226 what a bay-fronted Victorian terraced property at N4 is likely to require in practice.
All 31 of them, on MyBuilder, where they cannot be edited by us. They cover house extensions and the rest of what GS Renovation does across Haringey and Enfield, and the 4.9 average is the honest picture rather than a selected one. References for an N4 property are available on request. Ring 07472 424 226 and we will point you at recent Haringey work. Nothing in those reviews is selected or edited by GS Renovation in Haringey.
Many single-storey rear extensions in Haringey fall under permitted development, but side returns, double-storey extensions and work in conservation areas usually need full permission. We assess your N4 property and manage both the Haringey Council application and building control.
Comfortably. What house extensions demands in an older Haringey home is investigation first, because aged materials and irregular dimensions change both method and programme at an N4 property. GS Renovation prices that from experience rather than guarding against it. Ring 07472 424 226 and we will talk through what your Haringey house is likely to need. The N4 survey is free, and the written Haringey quotation for house extensions follows only a few days later.
It depends on the property. Many single storey rear extensions in Wood Green are permitted development if they stay within the size and height limits, but conservation areas, flats and larger projections need a planning application to Haringey Council, and some require prior approval first. We check your specific address before design, then handle building control regardless of which route applies.
That postcode is well within the patch. GS Renovation carries out house extensions throughout Haringey and the N4 area and into Enfield, with no surcharge for one part of Haringey over another. Free survey, no obligation, and a written quotation afterwards. Email info@gsrenovationltd.co.uk with the address and we will arrange a visit. Building control goes through Haringey Council exactly as it does elsewhere. Small jobs and full projects are quoted on exactly the same basis in Haringey.
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 Haringey. Explore what else we do locally:
Same Service, Nearby Areas
We carry out house extensions across Haringey and the surrounding areas. Explore a nearby location:
Free, no-obligation quote for house extensions in Haringey. Rated 4.9 from 31 reviews on MyBuilder, fully insured, and building control handled for you.