Kitchen Extensions New Malden

A kitchen extension in New Malden is usually shaped by the house type. 27% of homes in the area are terraced and 40% are semi-detached or detached, so the choice sits between a side return, a rear addition or a wrap across both. Kingston's Residential Design SPD sets its own limits on depth, height, garden left over and side extension width, and those limits decide the plan before any kitchen layout is drawn. We build the shell and fit the kitchen in one programme.

In New Malden, 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 New Malden: 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.

How deep a rear kitchen extension can go in New Malden

Kingston's Residential Design SPD says a single storey rear extension should generally not exceed 3-3.5m in depth, and that figure is the starting point for a New Malden kitchen plan that goes through a planning application. It is a design guide, so a deeper scheme needs a reason your designer can argue. The same SPD asks for a shallower projection where the house next door sits lower, which matters wherever a street slopes and the floor levels step down from one house to the next.

Height is set in the same document: a flat roof should not exceed 3m, a parapet 3.3m and a pitched roof 4m. Those caps decide the roof build-up. A flat roof with roof lights needs its insulation, deck and upstand to fit inside the height, so we agree the ceiling line in the kitchen with you before the steel goes in, not after the joists arrive. It also fixes how far the roof lights can sit above the worktop.

Housing in New Malden

Take the 7,070 or so homes the valuation list gives New Malden: 31% flats, 69% houses, 33% from before 1919, 33% interwar and 34% post-war. A semi in New Malden can wrap its kitchen into the side passage, and 31% of homes here are semi-detached.

Side extensions and wraparounds on New Malden semis

On a New Malden semi the spare ground can be beside the house, and Kingston's SPD sets three rules for building there. A single storey side extension should in general be no wider than 50% of the original house. It should sit at least 250mm in from the boundary so the gutter stays on your side, and normally be set back at least 500mm from the front wall. We set those lines out on site with string before digging, so you can see the room.

Those three measurements fix the width of the new kitchen before anyone picks units. The boundary gap means a gutter and fascia detail that stays inside your line, and the setback keeps the front of the semi reading as it was built. Where the side and rear parts join into a wrap, the corner usually carries a steel post or a goalpost frame, and the structural engineer we appoint sizes it to the openings you want. Footings dug close to the neighbour, or steel bearing on the party wall, can bring the Party Wall Act in, and the notices are served by you as building owner, not by us.

Keeping half the garden behind a New Malden kitchen

Kingston's SPD says that in all cases at least 50% of the rear garden should remain when a single storey rear extension is added. On a long plot that rarely bites, but on a shorter terrace garden it can cap the depth before the 3-3.5m guide does. We measure the garden at the survey so the drawings start from a depth that leaves the required share, and we mark where the patio, shed and bins will go once the build is finished.

The garden that remains also carries the drainage run. A new kitchen sink, dishwasher and any rainwater from the flat roof need falls to an existing gully or manhole, and moving a manhole inside the new footprint adds a step to the groundworks. Building over or close to a public sewer also needs the water company's agreement before the footings go in. We dig trial holes early where the drain route is unclear, so a surprise under the patio does not stop the slab pour. The same visit checks whether the new drain can connect by gravity or needs a pump.

Permitted development and flats in New Malden

Some New Malden houses can extend without a planning application. National rules let a single storey rear extension go up to three metres beyond the original rear wall of a semi or terrace, or four metres on a detached house, with a four metre height cap. Your designer confirms whether the house still has those rights before the drawings are fixed, because earlier extensions or planning conditions can remove them. Where they apply, a lawful development certificate is worth having before the foundations are dug.

Flats and maisonettes have no householder permitted development rights, so a ground floor flat in New Malden needs planning permission for any kitchen extension, and normally the freeholder's consent under the lease as well. The steel into the house, the new kitchen floor and the roof lights are then built to the approved drawings. We run the extension and the kitchen fit-out as one sequence, so the plasterer, electrician and fitter follow on in order.

• Airbrick ducts to keep existing timber floors ventilated
• Wet underfloor heating laid in the new screed
• Utility rooms and larders at the back of the extension

VOA Council Tax stock of properties, March 2025, for New Malden East and New Malden West. Counts rounded by the VOA.

Once the kitchen extensions work in New Malden is scoped, people usually go on to read kitchen renovation in New Malden, kitchen extensions across Kingston upon Thames, fitting the kitchen itself, the Party Wall Act on a boundary build, how we handle kitchen extensions across London and Utility Rooms and Their Cost.

Trusted Kitchen Extensions in New Malden

A kitchen extension is two jobs that are often bought separately: a building shell and a fitted kitchen. We run both, so the steel, drainage, floor and roof are set out for the kitchen layout you have chosen rather than adjusted to it later. You get a written quotation after a survey, one programme covering both phases, and a single point of contact from the first trial hole to the last worktop joint. The founder has spent decades on site building this kind of work.

• Rooflights set out against the engineer's steel layout
• Our own trades on site rather than a chain of subcontractors
• Drains surveyed by camera before the footprint is fixed

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.