House Extensions Golders Green

GS Renovation builds extensions across Golders Green, adding space to the Edwardian and interwar semis, terraces and detached houses of NW11. We take on rear, side-return and wrap-around extensions, from the foundations and steelwork through to a fully fitted finish.

In Golders Green, a single-storey rear extension typically starts from £40,000, or £2,000 to £2,800 per m² (indicative London ranges, Architecture for London, Resi, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Golders Green: the structural engineer we appoint designs the structure, we build it, and building control signs it off.

Side-return extensions in Golders Green

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 the houses that have one. 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. A kitchen extension in Golders Green is usually this side infill, a single storey rear extension across the back of a semi, or both together as a wrap-around, and the choice comes down to how the kitchen, the dining table and the garden doors need to line up.

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.

Housing in Golders Green

Golders Green's housing, as the Council Tax list records it, is about 7,590 homes: 44% houses, 56% flats, with 47% pre-1919, 26% interwar and 27% built since 1945. Most homes here are flats, and a flat in Golders Green has no householder permitted development rights, so extending one needs planning permission and the freeholder's consent.

Extending a Golders Green house inside Hampstead Garden Suburb

Where a Golders Green house lies within the Hampstead Garden Suburb Conservation Area, building an extension needs consent from both Barnet Council and the Hampstead Garden Suburb Trust. Treat them as two separate approvals with their own applications and timetables, and order nothing until both are in hand. The Suburb's design guidance also sets a width limit that shapes the design from the first sketch: rear extensions should generally not be wider than half the width of the rear elevation and, in most instances, less. That makes a full width kitchen extension hard to justify, so the layout inside is planned around a narrower addition and a wider opening into the existing house.

Inside the Suburb or outside it, the next check is the levy. Barnet was one of the first London authorities to adopt and implement the Community Infrastructure Levy, in May 2013, and adopted its revised charging schedule on 1 March 2022. An ordinary single storey addition is normally below the size at which a householder extension becomes liable. A large double storey or wrap-around scheme, or one designed so part of the house can be let as a separate flat, should be checked with the council before work starts. If an exemption has to be claimed, the claim goes in before commencement.

Double storey extensions on Golders Green homes

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 Edwardian and interwar houses, from brick and render to the roof line and window proportions. Where the flank wall is shared with the attached house, the Party Wall etc. Act applies and you serve notice as building owner. 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.

Kitchen extensions in Golders Green

56% of homes in Golders Green are flats, and a flat has no householder permitted development, so a ground-floor flat's kitchen extension needs planning permission from Barnet Council and the freeholder's consent. Most kitchen extensions here are on the 44% of homes that are houses. The fit-out is priced on its own page, kitchen renovation in Golders Green; the build figures are in the table above.

• Planning applications and permitted development assessments
• Drainage diversion and build-over agreements with the water authority
• Wrap-around extensions and infills

VOA Council Tax stock of properties, March 2025, for Golders Green North and Golders Green South. Counts rounded by the VOA.

People planning house extensions in Golders Green may also want RSJ and steel beam installation in Golders Green, house extensions across Barnet, double storey extensions, garage conversions in London, house extensions across London and Garage Conversion Cost.

Why Golders Green Homeowners Choose GS Renovation

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, and we build to the Building Regulations through to Barnet Council's building control sign-off. Our founder's 30+ years of work stands behind every job.

• Brick and mortar matched to the existing elevation
• Free follow-up visit after completion if anything needs attention
• Programme planned around party wall notice periods before excavation near a neighbour

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.