Kitchen Extensions Wallington

A kitchen extension in Wallington comes in two main forms. On the SM6 terraces it is a side return or a modest rear addition; on the semis and detached houses, which make up 37% of homes against 16% terraced, it is a deeper rear or wraparound room. We build the shell, bring the drainage and steel into the house, and run the kitchen fit-out in the same programme, so one team carries the job from the footings to the worktops.

In Wallington, 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 Wallington: 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.

Which kitchen extension suits a Wallington semi or terrace

The house type decides the shape of the extension in Wallington before any drawing is made. Semi-detached and detached houses account for 37% of the stock here and terraces for 16%, so the wider plot is the more common starting point. A semi with a clear flank can take a rear extension that wraps round the side, pulling the old dining room, the kitchen and a new glazed end into one room. A terrace has less to play with, so the gain comes from filling the side return and squaring off the back.

That choice sets the sequence on site. A wraparound means two new walls meeting the house, two openings to support and a longer run of foundations along the boundary. Digging foundations within set distances of a neighbour's building, or building on the line of junction, can be notifiable under the Party Wall etc. Act, and the building owner serves those notices, not the builder. A side return infill is narrower but often means removing the rear wall of the original kitchen and the side wall of the back addition, so the steelwork carries more of the house. Before any price we measure the rooms, look at the rear wall and the neighbouring extensions, and tell you which layout the plot and the structure will realistically take.

Housing in Wallington

The stock in Wallington runs to roughly 7,270 dwellings, 45% of them flats and 55% houses, built 30% before 1919, 28% between 1919 and 1939 and 42% after 1945. 31% of homes here are semi-detached; a semi in Wallington can take its kitchen extension across the back and round into the side passage, which leaves room for a utility behind the kitchen.

Permitted development limits for a Wallington house

A single storey kitchen extension on a Wallington house can often be built without a planning application if it stays inside the national limits. Under permitted development a rear extension cannot project more than four metres beyond the original rear wall of a detached house, or three metres for any other house, and it cannot be more than four metres high. Subject to prior approval, and away from designated land, the depth can rise to eight metres detached or six metres for any other house.

Those depths are measured from the original rear wall, so an earlier back addition on a Wallington semi may already have used some of the allowance. Side extensions on designated land, such as a conservation area, need householder planning permission in every case. Sutton also has an Article 4 Direction, confirmed in 1984, under which the affected properties need a planning application for extensions, so the address is checked first. Getting the category right early decides whether the programme includes a planning wait. The owner or their designer makes any application, and we build to the consent and the approved drawings, with the programme and drawings ready for whoever is handling the paperwork.

Extending a house in the Wallington Green Conservation Area

Around Wallington Green, extra care is needed before a kitchen extension is drawn. The Wallington Green Conservation Area was designated in 1971 and covers 3.7 hectares, and Sutton describes the terraced houses along Manor Road as having a distinctive unity of character. Within a conservation area, side extensions need householder planning permission, and the larger rear depths under prior approval are not available. Where an application is needed, it is judged on how the addition sits with the neighbouring backs. The owner's designer should check the conservation area boundary before the brief for the kitchen is fixed.

In practice that shapes the materials list as much as the footprint. Brick, roof covering and the proportions of any rear glazing are chosen to sit with the terrace, and the roof lights are placed where they read as part of the roof rather than a new feature. Sutton has also adopted a Design of Residential Extensions document as a supplementary planning document, which the owner's designer works from. We price and schedule the job around whatever the approved drawings specify, including any lead time for matching bricks in Wallington.

Drainage and building control for a Wallington kitchen extension

Drainage is often the first thing that changes the plan on a Wallington kitchen extension, because the new floor can cover the route of the existing pipes. Where Sutton is the building control body, work that will be near or cross public sewers needs a full plans application rather than a building notice. Sutton states full plans take a minimum of 5 weeks to approve, and building over a public sewer also needs the sewer owner's agreement. So we find the manholes and the run of the drain on the first visit.

Once the drainage question is settled, the steel, foundations and glazing follow the approved design and the inspections Sutton building control asks for. For an extension to a house, the inspection schedule says a completion certificate follows in 5 working days once the final inspection is passed and the installer certificates are in. That is why the electrician's and the glazier's paperwork is collected as each trade finishes in Wallington, not chased at the end, so the certificate is not held up.

• Airbrick ducts to keep existing timber floors ventilated
• New kitchen circuits, with Part P certification from a registered electrician
• Steel beams and goalpost frames into the existing house

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

For the wider picture around kitchen extensions in Wallington, see kitchen renovation in Wallington, kitchen extensions across Sutton, a wraparound kitchen-diner, sign-off by building control on a kitchen extension, kitchen extensions anywhere in London and Extend or Move?.

Why Choose GS Renovation in Wallington

A kitchen extension is two jobs that are often split between two firms: the building shell and the kitchen inside it. We run both from one programme, so the drainage runs, the steel, the floor build-up and the kitchen setting-out are agreed before the first trench is dug. The structural engineer we appoint sizes the steel, a registered electrician certifies the wiring, and the building control paperwork is gathered as each stage finishes. You deal with one team from the first visit in Wallington to the last worktop.

• Old kitchen kept in use until the new shell is weathertight
• Fully insured, with cover in place on every site
• Screed left to dry before the kitchen floor finish goes down

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.