Kitchen Extensions Richmond

A kitchen extension in Richmond upon Thames starts with the house type and the depth Richmond's own guidance treats as acceptable for it. The House Extensions SPD says a single storey addition is usually acceptable at up to 3m on a terraced house, 3.5m on a semi and 4m on a detached house. So a terrace in Twickenham and a semi in East Sheen start from different depths before anyone draws a roof. We build the shell, bring the drainage and steel through, and fit the new kitchen inside the same programme, working to the drawings and consent you or your designer hold.

In Richmond upon Thames, 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 Richmond upon Thames: 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 fits which Richmond upon Thames house

The house type sets the shape of the extension. In Richmond upon Thames 29% of homes are terraced houses and 26% are semi-detached or detached, and the two groups lead to different kitchens. A terrace typically gains its space along the narrow strip beside the back addition, then sometimes across the rear as well, which turns a galley into a room you can eat in. A semi or detached house has a full width rear wall to work from and often a side passage, so the choice is between a straight rear box and a wraparound.

Each route changes what is structural and what is plumbing. A side infill takes the flank wall of the back addition out and puts a beam along the old line, while a rear box takes out the back wall of the main house. Knowing which it is from the outset tells you how much steel to allow for, where the sink and appliances can realistically sit, and whether the new floor meets the old one at the same level. A side infill often sits on or against the boundary, which makes it Party Wall Act work: you, as building owner, serve the notices on the neighbour before we start.

Housing in Richmond upon Thames

The valuation list shows roughly 85,810 homes in Richmond upon Thames, of which 38% are pre-1919, 24% interwar and 37% post-1945, split 42% flats to 58% houses. A terrace kitchen extension in Richmond upon Thames starts in a narrow side return, and 29% of homes here are terraced.

Depth, eaves height and side infills under Richmond's own guidance

Richmond's SPD gives a depth guide for each house type, and a Victorian infill that goes beyond it is held to a lower wall. The SPD says a single storey addition is usually acceptable if it projects no further than 3m for a terraced house, 3.5m for a semi-detached house and 4m for a detached house. For Victorian infill extensions deeper than that, the eaves height is limited to 2.2m, which pushes a deep side return in Richmond upon Thames towards a roof that slopes up away from the neighbour's wall.

That eaves line decides the build detail. A 2.2m eaves leaves little room for a deep steel, a ceiling void and a gutter all at once, so the beam, the roof build up and the box gutter get worked out together before the walls go up. A conservation area adds a further point. Every side extension on that kind of designated land needs householder planning permission, so on a period terrace there the side infill is a planning application from the start.

Roof lights and glazed roofs over a Richmond upon Thames kitchen

Glazing needs thought here because Richmond has written guidance on it. Richmond's SPD warns against light pollution from excessive roof lights and glazed roofs, especially where a property is subdivided into flats, whose upper windows look down on the new roof when it is lit at night. A kitchen that relies on one large glazed roof can meet more resistance than a design with two or three well placed roof lights and a tall rear door set.

A ground floor flat starts from a stricter position. Householder permitted development rules for extensions apply to houses only, not to flats and maisonettes, so a ground floor flat in Richmond upon Thames has no permitted development route for a kitchen extension at all. The owner needs planning permission and, normally, the freeholder's consent under the lease. The flats upstairs will look at the new roof for years, so settling the glazing with them early saves argument later.

Drainage, steel and the kitchen fit-out in one run

The part of a kitchen extension nobody sees takes the most planning. A sink moved to an island or to the far wall of the new room needs a fall to the existing drain, and on a terrace that drain may run under the back addition you are building beside. We expose it early, confirm its route and depth, and agree any new inspection chamber before the slab goes down, so the floor is poured once with the waste runs already in it. If a shared or public sewer runs under the footprint, building over it needs the water company's consent as well as building control approval.

The steel that carries the house over the new opening is sized by the structural engineer we appoint, and where Richmond Council is your building control body, its inspection framework lists steel and timber beams as an additional inspection item. We book the steel inspection before the beam is boxed in, whichever body is checking the work. Once the shell is weathertight the same team moves on to first fix, plastering and the kitchen itself, so a family in Richmond upon Thames is not waiting between separate builders for a working room.

• Drain diversions and build over agreements with the water company
• Kitchen-diner layouts planned before the foundations
• Soil stack and gully rerouting beneath the new floor

VOA Council Tax stock of properties, March 2025, for all 23 statistical areas in Richmond upon Thames. Counts rounded by the VOA.

Once you know the scope of the kitchen extensions in Richmond upon Thames, it helps to read kitchen renovation in Richmond upon Thames, our Richmond upon Thames area guide, builders in Richmond upon Thames, party wall notices for a kitchen extension, our London kitchen extensions page and Planning a Kitchen Island.

The GS Renovation Difference in Richmond upon Thames

You get one team from the first drain dig to the last cabinet door, which removes the gap that usually opens between an extension builder and a kitchen fitter. We read Richmond's guidance for your house type before pricing, give you a written programme that shows when the steel inspection and the kitchen delivery fall, and build to the drawings and consent that you or your designer hold. The founder has more than three decades of hands-on building behind him.

• Free, no-obligation quotations
• Drains surveyed by camera before the footprint is fixed
• Rooflights set out against the engineer's steel layout

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.