Kitchen Extensions Wandsworth

A kitchen extension in Wandsworth starts from the building stock. 23% of homes here are terraced houses and 5% are semi-detached or detached, while 72% are flats, so the houses that can take one are mainly terraces. On a Victorian terrace in SW11, SW18 or SW17 that means a side return infill or a single-storey rear addition, with the kitchen fitted in the same programme. Flat owners follow a different route, because householder permitted development rights do not apply to flats.

In Wandsworth, a rear kitchen extension of about 30 square metres typically costs £45,000 to £97,500 excluding VAT, or £60,000 to £100,000 for a side return (indicative London ranges, Resi, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Wandsworth: the structural engineer we appoint designs the foundations and steel, we build the room and fit the kitchen, and a registered electrician certifies the electrics.

What a Wandsworth terrace can take at the back

The usual options for a Wandsworth terrace are a side return infill, a rear addition, or the two joined into an L around the back wall. Under national permitted development, a single-storey rear extension on a terraced or semi-detached house can reach three metres beyond the original rear wall, or four metres on a detached house, and no more than four metres high. Other conditions apply too, such as the eaves height near a boundary. Those limits say what can be built without a householder application; they do not say what suits the plot, which depends on the neighbour's windows, the garden depth and where the drain runs.

Past three metres, the larger home extension route can allow up to six metres on a house that is not detached, subject to prior approval and only outside Article 2(3) designated land such as a conservation area. That matters here, because Wandsworth has 46 conservation areas. A single-storey rear extension within the three metre limit can still be permitted development inside one, unless an Article 4 direction removes the right. We look at the title plan, the original rear wall and any earlier additions before a designer draws anything, because an old outrigger or a previous infill changes where the measurement starts.

Housing in Wandsworth

Wandsworth has around 157,900 homes on the Council Tax list: 49% post-war, 7% interwar and 43% predate 1919, with 72% flats and 28% houses. Where most homes are flats, only a ground floor flat in Wandsworth with its own garden can extend its kitchen.

Ground-floor flats in Wandsworth need planning for any extension

72% of Wandsworth homes are flats, and a ground-floor flat with a garden follows a different route from a house. Householder permitted development applies to houses only and not to flats and maisonettes, and Wandsworth's own conservation area guidance repeats that permitted development rights do not apply to flats or houses converted to flats. A rear kitchen extension to a flat therefore needs a planning application, drawn and decided before any build date is agreed.

The lease is the second consent. Check first that the garden is actually part of your flat's lease, and whether the lease restricts structural alterations or building on it. Where it does, the freeholder's licence to alter and the planning drawings should describe the same extension. We price and programme from those approved drawings, and we plan the build so the upper flat keeps its access, its drainage and its soil stack connection throughout, with the kitchen fitted once the shell is dry.

Article 4 streets where a Wandsworth extension needs permission

Wandsworth has 46 conservation areas, and eight of them carry Article 4 Directions. In the Latchmere Estate, one of the last remnants of traditional Battersea terraced streets between Battersea Park Road and the main railway line, the direction means extensions to the house need planning permission. So a small rear kitchen addition on the Latchmere Estate goes through an application whatever its depth, and the design, materials and programme all wait on that decision. Some directions cover only a few addresses, so read the direction for your street rather than the conservation area name.

For any Wandsworth conservation area, the council's FAQ lists front and side extensions of one storey or more, and two storey rear extensions, among works that need permission. National rules say the same of all side extensions on designated land. In practice that means a side return infill inside a conservation area cannot rely on permitted development, and the drawings need to show brick, roof and glazing choices that suit the street before the programme can be fixed.

Steel, glazing and building control on a Wandsworth kitchen extension

Opening the back of a Wandsworth terrace into a new kitchen means a beam, usually steel, designed by the structural engineer we appoint. Where Wandsworth Building Control handles the job, its standard extension charge covers forming an opening into the extension up to 1.5m wide, and an extra charge may apply for structural openings wider than that. A kitchen that takes out the whole rear wall and the side return wall sits well past that width, and the inspector sees the steel before the ceilings close.

Wandsworth asks for the application 48 hours before starting on site and notice 24 hours before work commences. We sequence the job around the inspection points: foundations and drainage first, then steel and the roof, then roof lights and the glazed rear wall, and only then the units, worktops and appliances. Approved Document L limits how much glazing an extension can have unless the design makes up the heat loss elsewhere, so settle the roof lights before the roof is ordered. Where Wandsworth is the building control body, its completion certificate follows a satisfactory final inspection.

• Wet underfloor heating laid in the new screed
• Utility rooms and larders at the back of the extension
• Boiler relocation and flue changes on the enclosed rear wall

VOA Council Tax stock of properties, March 2025, for all 38 statistical areas in Wandsworth. Counts rounded by the VOA.

Once you know the scope of the kitchen extensions in Wandsworth, it helps to read kitchen renovation in Wandsworth, our Wandsworth area guide, fitting the kitchen itself, sign-off by building control on a kitchen extension, kitchen extensions anywhere in London and Underfloor Heating Costs.

Trusted Kitchen Extensions in Wandsworth

One team runs a kitchen extension from the groundworks to the last worktop, so the drainage, the steel, the glazing and the kitchen are programmed together rather than handed between trades. The structural engineer we appoint designs the steel, a registered electrician certifies the wiring, and building control is coordinated at each stage. You get a written quotation after a survey and one named point of contact. The work draws on founder Abdelaaziz Saaid's more than thirty years of hands-on experience, so the details that decide whether an extension feels finished are checked by someone who has built them.

• Building control and Part P certificates handed over together at the end
• Honest updates if a date or a detail has to move
• Boiler flue, soil pipe and gully moved off the rear wall in the right order

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.