Kitchen Extensions Windsor

A kitchen extension in Windsor is shaped by two very different kinds of house. The minor street terraces of Inner Windsor have narrow frontages, and rear access runs through the house, along an alleyway or through a passage between properties. The 1950s semis around Dedworth Drive sit on spacious plots with more room at the side and back. We plan the extension, the steel, the drainage and the new kitchen as one programme, so the kitchen goes in as part of the same job.

For Windsor, 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; Berkshire work generally runs below that. GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Windsor: 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 a Windsor terrace and which fits a semi

The house type decides the extension, and in Windsor 30% of homes are terraced houses while 32% are semi-detached or detached. On a terrace the usual move is a side return infill or a modest rear addition. On a semi or a detached house there is often room for a full width rear extension or a wraparound. Four conservation areas lie in Windsor, including Inner Windsor, and in a conservation area a side extension, which includes a side return infill, is not permitted development.

Flats are different. A flat has no householder permitted development rights, so any extension to one needs planning permission, which the owner or their designer applies for. The lease will normally require the landlord's consent as well, usually as a licence to alter. With 34% of Windsor homes being flats, it is worth reading the lease before any design fee is spent. We build to the approved drawings and give the landlord's surveyor the programme and method statement they ask for.

Housing in Windsor

Roughly 16,960 dwellings sit on the valuation list for Windsor. 66% are houses and 34% flats, and by age 22% predate 1919, 8% are interwar and 68% post-war. A terrace kitchen extension in Windsor starts in a narrow side return, and 30% of homes here are terraced.

Getting materials into a Windsor terrace with no side access

On the minor streets of Inner Windsor, the only way to the back garden is often through the house itself. The council's Inner Windsor appraisal records that rear access on those two storey terraces is through the dwelling, by a rear alleyway or through passageways between properties. That one detail shapes the whole job. Every bag of spoil going out and every block, steel and roof light coming in has to travel along a route we protect first.

Where there is an alleyway we check its width and who has rights over it before the programme is fixed. Where there is none, we sheet and board the hall, time the steel delivery for a single lift through the house, and plan the demolition so rubble leaves in small loads. On streets like Grove Road, where the council describes small dwellings built up to the pavement with modest rear yards, that planning matters more than the floor plan.

Ground conditions under Windsor change the foundation you need

Windsor sits on two quite different grounds, and the foundation design follows the ground. British Geological Survey bedrock mapping shows London Clay Formation beneath Dedworth, including Dedworth Road, Dedworth Drive, Wolf Lane and Smiths Lane. Where clay is at or near the surface it shrinks and swells with moisture and trees, so the structural engineer we appoint may call for deeper trench fill near hedges and large shrubs. The building inspector checks the depth when the trenches are open.

Towards the river the picture changes. The same mapping shows Shepperton Gravel, sand and gravel, at Alma Road, Trinity Place, Clarence Crescent and Vansittart Road. Gravel drains freely but can be loose at the surface, and trench sides may need support in wet weather. Where a planning application is needed, any tree over 75mm in diameter within influencing distance of the work needs a BS5837:2012 survey under Policy NR3 of the Borough Local Plan, and that survey can move the footprint.

Steel, inspections and drainage on a Windsor kitchen extension

Opening the back of the house into the new kitchen usually means a steel beam. Where the Royal Borough of Windsor and Maidenhead is your building control body, it has a specific inspection stage for that steel before it is boxed in. Its published notice periods are two days' notice before work starts, one day's notice for foundation excavations and for steel before encasing, and seven days' notice before occupation. We build those dates into the programme so the plasterer is never booked before the inspector has been.

A kitchen moves the sink, the dishwasher and often a new WC or utility, and each needs a fall to the existing drain. Thames Water is the sewerage undertaker across the borough, so building over or close to a public sewer needs its agreement before the foundations go in. We trace the runs early with a camera survey, then plan the new connections, gullies and rainwater from the roof lights in one drainage layout.

• Sliding, bifold and steel-framed glazed doors to the garden
• Utility rooms and larders at the back of the extension
• Boiler relocation and flue changes on the enclosed rear wall

VOA Council Tax stock of properties, March 2025, for all 5 statistical areas in Windsor. Counts rounded by the VOA.

Plenty of Windsor projects start with one job and grow, so it helps to see kitchen renovation in Windsor, kitchen extensions in Slough, a side return kitchen infill, the Party Wall Act on a boundary build, how we handle kitchen extensions across London and Renovating a 1930s Semi.

The GS Renovation Difference in Windsor

A kitchen extension is two jobs, the building shell and the kitchen inside it, and they are often priced by two different firms. We run both in one sequence, from the setting out and foundations through the steel, roof and glazing to the worktops and the final electrical and plumbing connections. You have one programme, one point of contact and one set of drawings on site. The structural design comes from the engineer we appoint, and the registered trades sign off their own work.

• Free follow-up visit after completion if anything needs attention
• Kitchen layout agreed before the foundations, so the services land in the right place
• 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.