Kitchen Extensions Aylesbury

A kitchen extension in Aylesbury is normally a single storey addition to a house: 36% of homes are terraced and 37% are semi-detached or detached. With 88% of homes built after 1945, a terrace here rarely has the narrow side return of a Victorian one, so the usual shape is a rear addition across the back, with semis taking a deeper rear or wraparound. Flats, 25% of homes, have no householder permitted development rights. We build the shell, the steel and the kitchen in one programme.

For Aylesbury, on London-derived ranges 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; Buckinghamshire work generally runs below that. GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Aylesbury: 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 far back the council's design guide expects the extension to go

Buckinghamshire's design guide for the Vale of Aylesbury gives the depth the council looks for when an application is needed. Principle DES62 says a rear extension should normally project no more than three metres from the original rear elevation on a terraced house, and four metres on a semi-detached house. A small single storey extension within permitted development limits needs no application at all, but a larger or wider one does, and that figure then shapes the kitchen. On a terrace, three metres usually means a run of units with a table beyond it rather than an island.

The measurement is taken from the original rear wall, so an earlier lean-to or conservatory does not move the starting line. On a semi, the extra metre is where the dining table ends up. Where you want more depth than the guide suggests, your designer has to make the case in the application. We price and programme from the depth on the approved drawings, and we set out the footings to those dimensions on day one.

Housing in Aylesbury

Around 35,320 homes make up Aylesbury on the valuation list; 25% are flats and 75% houses, and 6% date from before 1919, 6% from between the wars and 88% from after 1945. 36% of homes here are terraced; a terrace kitchen extension in Aylesbury starts in a narrow side return.

Inside the Aylesbury Conservation Area the extension rules are tighter

Houses in the Aylesbury Conservation Area lose much of the permitted development room found elsewhere in the town. The council's adopted appraisal says any extension there needs planning permission other than a single storey rear extension of 4 metres or less, cut to 3 metres or less where the house is terraced or semi detached. Walton and the Victorian villas on Wendover Road are both inside that one conservation area.

The appraisal also lists new openings in external elevations among the works that need permission there. So a new side window, a garden door in a flank wall or a widened opening in an elevation that stays external belongs on the drawings from the start, not added later. Where the extension itself needs an application, show the steel and the opening into the new room on the same drawings. On a Wendover Road villa or a Walton terrace we build to the approved drawings exactly, with brick and bond agreed before the walls go up.

Clay ground and brooks in Aylesbury decide the foundation and the drain run

Several of Aylesbury's estates are mapped on clay bedrock: Walton Court and Hawkslade on the Gault Formation, and Quarrendon, Elmhurst, Fairford Leys and Berryfields on Kimmeridge Clay mudstone. Clay soils shrink and swell with the seasons and with nearby trees, and the map is only a guide to one plot. So the structural engineer we appoint sets the depth and type of foundation from a trial hole, not from what the neighbour did. We dig that hole early, so the design is fixed before the main excavation.

The town is crossed by named watercourses, including the Bedgrove Brook, the Southcourt Brook and the California Brook, and the Bear Brook is a main river. Work close to a main river can need a flood risk activity permit from the Environment Agency, so check before the footprint is fixed if the garden backs onto one. Thames Water runs the adopted sewer network, and if a public sewer lies under the footprint, its build over agreement comes before the trench is dug. We trace the drain run and the chambers first.

Steel, glazing and the kitchen fit in one Aylesbury programme

Opening the back of an Aylesbury house means a beam across the new opening, sized by the structural engineer we appoint and inspected with the rest of the structure. Buckinghamshire Council names foundations, damp proofing, roof structure, drainage and completion among its inspection stages. We plan the programme around those visits so the roof is not boarded before the joists have been seen, and so the drains stay open until they are checked.

Roof lights and a wide rear door set decide how light the room is, and they have to be ordered while the shell is still going up. Once the roof is on and the glazing is in, the first fix electrics and plumbing go to the kitchen layout already agreed. Then the floor, the plaster and the units follow in the same programme, with no gap between two contractors. You get one team from the footings to the worktop.

• Soil stack and gully rerouting beneath the new floor
• Flat roofs with rooflights or a roof lantern over the kitchen
• Building control inspections from footings to completion

VOA Council Tax stock of properties, March 2025, for all 10 statistical areas in Aylesbury. Counts rounded by the VOA.

If you are weighing up kitchen extensions in Aylesbury, it may help to read kitchen renovation in Aylesbury, kitchen extensions in Tring, a wraparound kitchen-diner, the Party Wall Act on a boundary build, how we handle kitchen extensions across London and Getting Daylight Into a Deep Plan.

Why Aylesbury Homeowners Choose GS Renovation

We run the whole job ourselves: the trial hole, the foundations, the drains, the steel, the roof and glazing, then the kitchen units and worktops. The structural engineer we appoint does the calculations, and we build to them. Your designer or agent makes the planning application where one is needed, and we build to the approved drawings. You deal with one team and one programme, and the kitchen is planned from the first visit instead of fitted around whatever the shell turned out to be.

• One contract for the groundworks, the steel and the kitchen fit
• Rated 4.9 from 31 reviews on MyBuilder
• 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.