Kitchen Extensions Welling

A kitchen extension in Welling starts from the interwar house: the VOA puts 76% of homes here in the 1919 to 1939 bracket, 58% semi-detached or detached and 15% terraced. That stock points to rear and wraparound extensions more than the side return infill that suits a terrace. Where planning permission is needed, Bexley's Design Guide SPD Part 2 sets typical limits on how deep and how tall the new room should go, and we build the shell, the steel and the kitchen itself as one programme.

In Welling, 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 Welling: 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 Bexley's Design Guide expects at the back of a Welling semi

Bexley's Design Guide SPD Part 2, adopted on 29 June 2026, is the design guidance a planning application for your Welling extension is judged against, alongside the Local Plan. It says an extension to a terraced or semi-detached dwelling should typically not exceed 3.5m deep. It also says a single-storey extension should not exceed 4m at its highest point, with an eaves height of no more than 3m. Those limits shape the room before any kitchen layout is drawn, so we read them with your designer at the start.

For you that means the kitchen has to earn its space sideways inside a set envelope. A 3.5m depth across the full width of a semi gives a workable family kitchen, but the island, the dining table and the door swing all need planning to that line. The 3m eaves figure also sets how high the side walls or a parapet can rise, and so the roof build-up and the ceiling height inside, which your designer settles before the steel is sized.

Housing in Welling

The Welling statistical area counts roughly 4,020 homes for Council Tax; 5% are older than 1919, 76% interwar and 18% post-war, with 21% flats and 78% houses. 56% of homes here are semi-detached; a semi in Welling can take its kitchen extension across the back and round into the side passage, which leaves room for a utility behind the kitchen.

Wraparound kitchens on Welling corner plots and wider semis

A wraparound in Welling is treated as a rear extension for design purposes. Bexley's Design Guide SPD Part 2 says single-storey wraparound extensions must follow the design parameters for single-storey rear extensions, so the side leg does not buy extra height or depth on the back. Because it combines a side and a rear extension, a wraparound normally goes through a householder planning application rather than permitted development. On a semi with a gap to the boundary, the wrap fills the old side passage and turns the kitchen into an L.

The practical change is structural. Where the rear leg meets the side leg, the corner of the old house comes out, so a steel post or a goalpost frame takes the load that the brick corner carried. The structural engineer we appoint designs that frame, and we sequence the demolition so the corner is propped before any brickwork is cut. The side leg also closes off the route the bins and the garden used, so access is planned early.

Permitted development or a planning application in Welling

Some Welling houses can build a modest rear kitchen extension without a planning application; flats cannot. Under national permitted development rules a single-storey rear extension can go four metres beyond the original rear wall of a detached house or three metres for any other house, and no higher than four metres. Outside Article 2(3) designated land, such as a conservation area, the larger home extension route raises that to eight or six metres, subject to prior approval, which is a separate decision from a planning application.

Those rules apply to houses only, not flats and maisonettes, so a ground floor flat or maisonette in Welling needs a planning application for any extension into the garden. Prior approval brings the neighbours into it and needs its own decision before work begins. Whichever route your designer takes, we build to the approved drawings and keep the height and depth on site to what was consented, measured from the original rear wall.

Drains, steel and the building control route in Welling

The drain run behind a Welling semi can decide which building control route your kitchen extension takes. Bexley says a building notice cannot be used for building an extension over or within 3m of a drain, sewer or disposal main controlled by Thames Water. Where the run crosses your garden, a full plans application is the route, and the foundations are designed to bridge or clear the pipe. Thames Water's own agreement to build over or near its sewer is a separate consent from building control.

A Bexley full plans application generally needs a construction specification and structural calculations for the steel beams, so the engineer's design has to be ready before the application goes in. Bexley checks full plans and issues a decision within five to eight weeks. We use that window to order the steel, fix the kitchen layout and book the trades, so the dig can start once the decision arrives and the 48 hours' notice to building control has been given.

• Kitchen-diner layouts planned before the foundations
• Foundations, drainage and slab with the kitchen services cast in
• The kitchen itself fitted under the same contract as the build

VOA Council Tax stock of properties, March 2025, for the Welling statistical area, one of several statistical areas covering DA16. Counts rounded by the VOA.

Useful next reading for a kitchen extensions project in Welling: kitchen renovation in Welling, kitchen extensions across Bexley, fitting the kitchen itself, sign-off by building control on a kitchen extension, kitchen extensions anywhere in London and Utility Rooms and Their Cost.

Why Welling Homeowners Choose GS Renovation

We take a Welling kitchen extension from the foundations to the last worktop joint under one programme, so the builder and the kitchen fitter are the same team working to one sequence. The structural engineer we appoint designs the steel, a registered electrician certifies the new circuits and an engineer on the Gas Safe Register moves any gas supply. You get a written quote after a site visit, a written programme and one person to call about progress.

• One point of contact on the phone, not a call centre
• Old kitchen kept in use until the new shell is weathertight
• 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.