Single and double storey extensions in Golders Green. Trusted, professional, 30+ years' hands-on experience.
GS Renovation designs and builds extensions across Golders Green, adding space to the bay-fronted Victorian and Edwardian terraces of NW11. With more than 30 years of experience in North London, we take on rear, side-return and wrap-around extensions, from the foundations and steelwork through to a fully fitted finish.

The side return is the narrow alley beside the rear closet wing, and filling it in is the classic way to widen a cramped kitchen in these terraces. We dig new foundations tight against the boundary, build the flank wall, and carry the existing rear slope on a steel beam. The result is a wider, brighter kitchen-diner running the full width of the house.
Many single storey rear and side-return extensions in NW11 fall under permitted development, but this is not guaranteed. If your home sits within the Hampstead Garden Suburb conservation area, or has already been extended, permitted development rights may be restricted or removed, and a full planning application to Barnet Council is needed. We check the position for your specific property before design work begins, so there are no surprises later.
Where the plot allows, a double storey extension adds a bigger kitchen below and an extra bedroom or en-suite above. On the generous plots common in parts of NW11 there is often room to build out and up, though a two-storey addition almost always needs planning permission from Barnet Council rather than falling under permitted development. We manage the application, the engineer's design and the whole build.
Extending upward also means matching the character of these Victorian and Edwardian houses, from brick and render to the roof line and window proportions. Where the flank wall is shared with the neighbouring terrace, the Party Wall etc. Act applies and notices must be served. We coordinate foundations, drainage, steel beams, roofing and the interior fit-out, keeping building control involved throughout so the finished extension is properly inspected and signed off.
Homeowners in Golders Green choose GS Renovation because one team runs the extension from first drawings to final decoration. We advise honestly on whether your project is permitted development or needs planning, handle party wall notices, and build to Barnet Council building regulations. Thirty years of work across NW11 and nearby Finchley, Hendon and Edgware stands behind every job.
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
Every Golders Green project is priced on its own merits, as the cost of house extensions varies with the size, specification and condition of the home. We give a clear, itemised quote up front with no obligation. Call 07472 424 226 for an estimate tailored to your property. 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.
How long house extensions takes in Golders Green depends on the size of the job, but we always agree a programme before starting and stick to it, keeping you informed from the first day to the last.
Because we manage every trade in-house, your Golders Green 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 Golders Green clients recommend us.
Many single-storey rear extensions in Golders Green 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 Golders Green'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 your property. Many single storey rear extensions in NW11 are permitted development, but homes in the Hampstead Garden Suburb conservation area, or those already extended, often lose those rights and need a planning application to Barnet Council. Double storey extensions almost always need permission. We check your address and its planning history before we design anything.
Yes. We work throughout Golders Green and the NW11 area, as well as the surrounding parts of North London. Contact us on 07472 424 226 to confirm we cover your street.
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 Golders Green. 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 Golders Green and the surrounding areas. Explore a nearby location:
Contact GS Renovation today for a free, no-obligation quote for house extensions in Golders Green.
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