Kitchen Extensions Ruislip

A kitchen extension in Ruislip is usually a question of how far back a mock-Tudor semi or an interwar terrace can go before the garden, the neighbour and the borough rules push back. The VOA count puts terraced houses at 30% of homes here and semis or detached houses at 34%, so the rear of the house is where the kitchen grows. We build the shell, set the steel into the old back wall and fit the kitchen in the same programme, so one team carries the job from footings to worktops.

In Ruislip, 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 Ruislip: 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 Ruislip kitchen extension can go at the back

The depth is set by the width of your plot and the type of house. Hillingdon Policy DMHD 1 says a single storey rear extension on a terraced or semi-detached house should not exceed 3.3 metres deep where the plot is 5 metres wide or less, and 3.6 metres on a wider plot. For a detached house the policy figure is 4.0 metres. Measure the plot at the back wall before a designer draws anything, because that figure decides which limit you are working to.

Height follows the same logic. Hillingdon policy says a flat roofed single storey extension should not exceed 3.0 metres and a pitched or sloping roof 3.4 metres, measured from ground level. For a kitchen that matters more than it sounds: a lantern, a thick warm roof build-up and a level threshold all eat into that envelope. We agree the finished floor level and the roof build-up on the drawings first, so the ceiling height inside is known before the order for glazing goes in.

Housing in Ruislip

By the valuation list's count, Ruislip holds about 20,620 homes, 73% houses and 27% flats; by age, 1% were built before 1919, 52% between the wars and 47% since 1945. Terraced houses make up 30% of homes here, and a terrace kitchen extension in Ruislip starts in a narrow side return.

Why permitted development runs short in Ruislip

Hillingdon has taken away the householder right to extend beyond the rear wall of the original dwelling by more than 4 metres. That Article 4 Direction covers the whole borough and came into force on 22 September 2014, so the six and eight metre allowance that prior approval offers elsewhere stops at 4 metres on a Ruislip house. A long kitchen and dining room that runs past that line needs planning permission.

Without prior approval, the national rules allow three metres for a semi or terrace and four metres for a detached house beyond the original rear wall. On a semi or terrace, the prior approval route can still take that towards the 4 metre line, though not on Article 2(3) land such as a conservation area. Original, in planning terms, excludes later additions, so an earlier lean-to may already have used some of the allowance. Your designer checks the planning history and picks the route: a lawful development certificate, prior approval or a householder application.

Side and wraparound kitchens on Ruislip semis

A wraparound, where the kitchen turns the corner into the side passage of a semi, is limited on its side leg. Hillingdon Policy DMHD 1 says a side extension should not exceed half the width of the original property. On a Ruislip semi, the side drive, the boundary and access to the back garden often narrow that strip further. The side leg may then end up as a utility, a larder or a WC, and the kitchen layout is planned around whatever width is approved.

Inside the Ruislip Village Conservation Area, the leaflet Hillingdon publishes says side extensions should normally be set back from the original building line, and permitted development gives no side extension at all on designated land. Ruislip Manor Way, designated in 1989, is a second conservation area here, and in any conservation area a flat roof is expected to carry a parapet. Each of those points changes the steel, the gutter line and the brick order, so we read the approved elevations closely before ordering materials.

Steel, drainage and glazing into an interwar Ruislip house

Opening the back of an interwar house means taking out a long stretch of the rear wall and carrying the bedrooms above on steel. The structural engineer we appoint sizes the beams and the padstones, and building control inspects the foundations and the steel before they are covered. On a semi, a beam bearing on the party wall is notifiable under the Party Wall etc. Act, and you as the building owner serve that notice. Where the soil stack and a gully sit on the old back wall, the drainage is surveyed early and any new run is set out before digging.

Glazing comes next. Wide sliding or folding doors need their own steel or a deep lintel, and the opening size is fixed before the frame is ordered. Roof lights and a lantern bring daylight into the existing back room of a Ruislip semi, which otherwise goes dark once the extension is on. Extraction, sockets and the island supply are run in first fix, so the kitchen fitters arrive to a room already wired and plumbed for their layout.

• Party wall process explained, with drawings for your notices
• Rear, side return and wraparound kitchen extensions
• Floor levels matched through the old opening

VOA Council Tax stock of properties, March 2025, for all 6 statistical areas in Ruislip. Counts rounded by the VOA.

Related reading for Ruislip homeowners planning kitchen extensions: kitchen renovation in Ruislip, kitchen extensions across Hillingdon, fitting the kitchen itself, sign-off by building control on a kitchen extension, kitchen extensions anywhere in London and Renovating a Victorian Terrace.

Why Choose GS Renovation in Ruislip

We build the extension and fit the kitchen as one job, with one programme and one point of contact from the first dig to the last cupboard handle. You get a written quote after a site visit, priced from the approved drawings. The structural engineer we appoint designs the steel, building control inspects each stage, and we keep the approved plans on site so every trade works to the same set. Abdelaaziz Saaid, our founder, brings more than thirty years of hands-on building to each job.

• Neighbours given notice before the noisy stages
• Building control and Part P certificates handed over together at the end
• 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.