Kitchen Extensions Coulsdon

In Coulsdon 48% of homes are semi-detached or detached and 15% are terraced, so a kitchen extension here is more often a full-width rear extension, or a wraparound that also runs along the side, than a terrace side return infill. A wraparound generally needs a planning application, because it goes beyond a side wall as well as the rear. The 27% of homes that are flats are different, because a flat has no householder permitted development rights. We build the shell, the steel, the drainage and the new kitchen as one programme, inspected by building control at each stage.

In Coulsdon, 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 Coulsdon: 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.

Rear or wraparound: what a Coulsdon semi usually gets

A Coulsdon semi typically takes a single-storey rear extension across the back, sometimes turned round the side into a wraparound. The housing here is described as 1930s and post-war semis and detached houses, and only 8% of homes predate 1919, so the Victorian side return infill is the exception. The side strip on a semi is often the driveway or a path to the garden, and building over it means deciding where the bins, the side gate and the meter boxes will go. Those small decisions change the shape of the drawings.

The permitted development limit on depth depends on the type of house. A single-storey rear extension can reach four metres beyond the original rear wall of a detached house, or three metres on any other house, and no more than four metres high. The measurement runs from the rear wall as first built, so an earlier conservatory or an old kitchen lean-to can already use the allowance. We check that on site before the design is fixed.

Housing in Coulsdon

Of the 7,540 homes the valuation list records in Coulsdon, 8% were built before 1919, 30% between the wars and 62% since 1945; 27% are flats and 73% are houses. A semi in Coulsdon can take its kitchen extension across the back and round into the side passage, which leaves room for a utility behind the kitchen, and 26% of homes here are semi-detached.

Old Coulsdon, Bradmore Green and planning for the kitchen

If the house sits in Bradmore Green Conservation Area, the kitchen extension needs more care over planning. The conservation area, designated in July 1968, covers the heart of Old Coulsdon around Bradmore Green and Grange Park. In a Croydon conservation area planning permission is required for side extensions and some rear extensions, so a wraparound there is a planning application from the start. The owner or their designer submits it, and we build to the consent.

Croydon's conservation guidance SPD says two storey rear extensions are generally unlikely to be considered acceptable in conservation areas, so plan a kitchen scheme there as single storey from the outset. Croydon also needs at least 6 weeks' notice before works to any tree in a conservation area. If a tree has to be cut back or removed to make room for the footings, the owner gives that notice before the programme is set. The tree work cannot go ahead until the period has run, and the digging waits on it.

Drainage runs and the steel into a Coulsdon house

The drains are the first thing to check, because they can decide which building control route the extension takes. On a Coulsdon semi an inspection chamber can sit close to the back wall, where the new kitchen floor will go. Croydon says a full plans application must be submitted if the work involves building over or within 3 metres of a public sewer, and building over a public sewer also needs the water company's agreement. A camera survey and the sewer records show early whether the run behind the house is a private drain or a shared public sewer.

Opening the back wall into the new kitchen means a steel beam carrying the wall and floor above, and Croydon says structural calculations may be required for openings like this. The structural engineer we appoint sizes the beam and its padstones, and we set temporary props before the old wall comes out. On a Coulsdon house built between 1919 and 1939 the rear wall often carries the ends of the bedroom floor joists. The propping has to catch them, and the inside of the house needs protecting for the day the opening is formed.

Inspections, glazing and fitting the kitchen in one programme

Where Croydon is the building control body, inspections for a Coulsdon extension are booked online at least 2 working days ahead and take place between 10:30am and 3:30pm on weekdays. We plan the concrete pour for the footings around that window, because a foundation that is ready at four in the afternoon waits for the next visit. The same goes for the drainage test and the steel. Planning the inspections into the programme keeps trades from standing idle.

Glazing and roof lights are ordered once the openings are built, since the sizes come off the finished structure, and a large glazed area has to satisfy the Part L energy calculation. On a deep semi, a roof light over the old back room brings daylight into the middle of the house, which otherwise loses its window to the extension. The kitchen fit goes in after the floor screed has dried and the plaster is sound, so units, worktop templating and appliances are booked into the same programme rather than left for a separate contractor.

• Airbrick ducts to keep existing timber floors ventilated
• Foundations, drainage and slab with the kitchen services cast in
• Party wall process explained, with drawings for your notices

VOA Council Tax stock of properties, March 2025, for Coulsdon and Old Coulsdon. Counts rounded by the VOA.

Once the kitchen extensions work in Coulsdon is scoped, people usually go on to read kitchen renovation in Coulsdon, kitchen extensions across Croydon, fitting the kitchen itself, sign-off by building control on a kitchen extension, kitchen extensions across London and Underfloor Heating Costs.

Trusted Kitchen Extensions in Coulsdon

A kitchen extension joins two jobs that are often split between firms: the building work and the kitchen itself. We run both, so the steel, the drainage, the electrics first fix and the units follow one sequence and one person answers your questions. The work is founder-led, not passed down a chain of subcontractors. You get a written programme, the structural engineer we appoint designs the steel, and building control inspects each stage it needs to see before it is covered up.

• Our own trades on site rather than a chain of subcontractors
• Drains surveyed by camera before the footprint is fixed
• 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.