House Extensions Wood Green

GS Renovation plans and builds extensions throughout Wood Green, working with the bay-fronted Victorian and Edwardian terraces that define N22. We build rear, side-return and wrap-around extensions on Haringey homes, handling the foundations, steelwork, roof and full fit-out as one accountable project from start to finish.

In Wood 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 Wood Green: the structural engineer we appoint designs the structure, we build it, and building control signs it off.

Side return extensions on Wood Green terraces

The side return beside the rear closet wing is the classic space to claim on a Wood Green terrace. Filling it in widens a narrow galley kitchen into a proper open-plan kitchen-diner running the full width of the house. We dig and pour the foundations, build the walls, install the steel beams that carry the original rear wall and fit a roof with rooflights to draw daylight deep into the plan.

These terraces sit on tight urban plots, so we plan access, spoil removal and material deliveries carefully around parked cars and neighbouring gardens. Where the extension meets or sits against a shared boundary, party wall matters usually apply, and you serve notice in good time as building owner, with the drawings we supply. The finished space is fully fitted, insulated to current standards and signed off by building control.

Housing in Wood Green

Of the 9,700 homes the valuation list records in Wood Green, 67% were built before 1919, 4% between the wars and 29% since 1945; 62% are flats and 38% are houses. Most homes here are flats, and a flat in Wood Green has no householder permitted development rights, so extending one needs planning permission and the freeholder's consent.

Rear extensions on the Noel Park estate in Wood Green

The Noel Park design guidance says rear extensions should not be built across the full width of the plot and should not usually extend more than three metres beyond the rear wall. That shapes a Wood Green kitchen extension differently from the familiar side infill on an ordinary terrace. A scheme that fills the side return and then runs across the whole back of the house is exactly what the guidance steers away from. The brief for an estate house starts with a narrower, shorter addition and a kitchen layout that works inside it.

In a Haringey conservation area single-storey extensions that extend more than 3 metres beyond the back wall of a house need planning permission. A shorter one can still be permitted development unless an Article 4 Direction removes that right, and Noel Park has had its own direction since 21 December 2020, so ask what it covers for your house. Book the householder planning advice service before an architect draws options, and ask specifically about width and depth for your house type, since those two dimensions decide whether the kitchen plan works. Bring photographs of any extensions nearby, with the dates they were built if you know them, so the discussion starts from what is already on the street.

Planning and permitted development in Haringey

Many single-storey rear extensions in Wood Green fall under permitted development, but that is never a given. If your house has already been extended, you are going to two storeys, or the house sits in a conservation area and you want a side infill or anything over one storey, a full planning application to Haringey Council is likely to be needed. A single storey rear extension within the limits stays permitted development in a conservation area unless an Article 4 direction removes it, so we check Haringey's Article 4 list for your street. We assess your property honestly at the outset and tell you which route applies rather than assuming the easy answer.

Whichever route you take, the structural side still needs building regulations approval, and that is separate from planning. Your architect or designer prepares the drawings and any planning application to Haringey Council; we build from them and book the building control inspections for the foundations, steel and drainage. Keeping the two processes distinct means no surprises, no enforcement risk and a build that stands up to scrutiny.

Inspection stages on an extension

An extension is inspected far more often than an internal alteration, and knowing the stages helps you follow the programme. The first visit comes at excavation, before any concrete goes in, so the inspector can see the foundation depth and the ground it will bear on. The second covers the concrete itself, then the damp proof course and the oversite before a floor is laid over the top of them.

After that come drainage, which is tested and inspected while it is still open, then the structural steel and its bearings, then insulation and the roof before either is covered. A final visit follows completion and releases the certificate. In Haringey the drainage and foundation visits are the ones most often missed by people managing their own build, and both are very hard to demonstrate once buried. We book each visit as the work reaches it and keep the inspector's records with the drawings, so nothing has to be reconstructed later.

Kitchen extensions in Wood Green

62% of homes in Wood Green are flats, and a flat has no householder permitted development, so a ground-floor flat's kitchen extension needs planning permission from Haringey Council and the freeholder's consent. Most kitchen extensions here are on the 38% of homes that are houses. The fit-out is priced on its own page, kitchen renovation in Wood Green; the build figures are in the table above.

Double storey extensions in Wood Green

Under permitted development a two-storey rear extension can go no more than 3 metres beyond the original rear wall and must stay at least 7 metres from the rear boundary, and in a conservation area it is not permitted development at all. Many gardens are too short for the 7 metre rule, so a double storey extension in Wood Green often needs planning permission from Haringey Council. It is a job for the 38% of homes that are houses; a flat cannot add a storey this way. The Noel Park design guidance says rear extensions should not be built across the full width of the plot and should not usually extend more than three metres beyond the rear wall (council source). Our double storey extension page explains the build, at £1,800 to £2,600 per m² across both floors.

• Insulation, airtightness and thermal detailing to regulations
• Roof works and structural alterations at roof level
• Planning applications and permitted development assessments

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

People planning house extensions in Wood Green may also want RSJ and steel beam installation in Wood Green, house extensions across Haringey, side return infills, party walls and extensions, house extensions across London and Party Wall Act Explained.

The GS Renovation Difference in Wood Green

Wood Green owners choose GS Renovation because we build extensions end to end, from groundworks and steel to the final coat of paint. We know the N22 terraces, the tight plots and the difference between permitted development and a Haringey planning application, and we back every project with our founder's 30+ years of building experience.

• Itemised pricing, so you can see what every stage costs
• Insulation and thermal detailing to current regulations
• Foundation depth set after trial holes, drains and trees are checked

Reviewed jobs near Wood Green

1 MyBuilder review from Wood Green, with each customer's own job title:

• New kitchen install moving plumbing, elecs, flooring, Wood Green, 19 Jan 2022 (5 out of 5)

Read all 31 on our reviews page.

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.