Kitchen Extension in Wandsworth Town, SW18
London service guide: Kitchen extensions.
A kitchen extension in Wandsworth Town is a daylight project before it is a building project. The Victorian terraces and Edwardian houses that dominate SW18 put the kitchen in the darkest corner of the plan — a narrow room at the back, separated from the garden — and the brief is to reverse that: one generous, light-filled space where cooking, eating and family life happen together. On the streets around Wandsworth High Street and across the area's period stock, that usually means building over the rear or the side and re-planning everything behind the front two rooms.
The engineering follows the layout. Opening the new kitchen back into the existing house means structural openings, and beneath the floor sit the foundations and drainage that every SW18 extension has to resolve; external materials must be matched, and everything arrives through dense residential streets. Because Wandsworth applies Article 4 controls and watches external change in its conservation areas closely, we settle the planning status of your street before the layout is drawn.
The arithmetic has two parts: a build rate per square metre of new area plus a kitchen supply allowance, with the shell itself priced after a survey for single-storey rear work.
Growing a kitchen into the garden
On Old York Road a new kitchen often grows from the outrigger, and the appraisal limits how far: half the depth of the existing rear aspect, with angled walls instead of squaring off the back, and at the rear only.
Because the land rises from the station and the backs of the terraces are often visible from the street, the extension's roof and materials are seen by more people than the neighbours.
North of East Hill the deep rear gardens the appraisal values give more room, and LP5 asks that a substantial depth of the original garden stay open, so the kitchen extension is sized against what remains.
Where the new room has a flat roof that will not be used as a terrace, LP5 strongly encourages a green roof, and the Housing SPD's general advice is a pitched roof and materials that match the house.
Outside Wandsworth Town: Holland Avenue, Wimbledon, a Wimbledon house with a two-storey rear and side addition.
Old York Road's appraisal also notes that glimpsed views to rear gardens and mature planting break up the backs of the terraces, so a kitchen extension that keeps some garden and planting reads better from the street behind.
Materials follow the house: in Old York Road's Article 4 area new external finishes need planning permission and are not normally approved at the front or flanks, so brick is matched rather than rendered.
Before design we confirm whether the plot has any earlier extension, because an outrigger that has already been enlarged leaves less room under the half-depth guidance.
We set the floor level of the new kitchen against the garden and the existing house at survey, because on a sloping plot it decides the steps, the drainage falls and the threshold.
Sources: Wandsworth: Old York Road conservation area appraisal (adopted 31 August 2023); Wandsworth: Wandsworth Town conservation area appraisal (adopted 31 August 2023); Wandsworth Local Plan 2023–2038 (adopted 19 July 2023); Wandsworth Council: Housing Supplementary Planning Document (adopted November 2016).
Kitchen Extension in Wandsworth Town: Questions
Will a kitchen extension affect my neighbours' light?
It can, which is why Wandsworth's Housing SPD warns that the neighbour to the north of a big extension loses most light, and advises against two-storey additions built right on the boundary.
Does a kitchen extension need Building Regulations approval?
Yes. A new extension needs approval for its structure, insulation, drainage and fire safety, separately from any planning permission, and we submit it with the engineer's calculations.
How is a kitchen extension priced in Wandsworth Town?
In two layers. The build itself is priced from the new floor area after a survey, and on top of that sits a kitchen supply allowance depending on the cabinetry, worktops and appliances you choose. Separating the two keeps a Wandsworth Town budget honest: the shell and the kitchen inside it move independently.
Should a Wandsworth Town kitchen extension go to the rear, the side, or wrap around?
It depends on where the light comes from and how the plot sits. A single-storey rear extension, a side return and a wraparound combining both are each priced differently, and we quote after a survey. We test each option against your kitchen layout before recommending one.
Which Wandsworth Town homes suit a kitchen extension?
Houses with room at the back: the late Victorian terraces north of East Hill with deep rear gardens, and Old York Road's cottages, where a modest outrigger within the appraisal's limits is possible.
Does planning affect a kitchen extension in Wandsworth Town?
Often. In the Wandsworth Town and Old York Road conservation areas the appraisals guide rear extensions, Old York Road's limiting outriggers to half the existing rear depth, and blocks of flats have no permitted development rights.
What construction issues come up when extending a kitchen in Wandsworth Town?
The recurring ones in SW18 are the structural openings that connect the new kitchen back into the house, foundations and drainage at the rear, party walls with the neighbouring terrace, rear access for the build, trees and boundary conditions, and sourcing external materials that match the original — all managed around the logistics of working in dense residential streets.
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