A kitchen renovation becomes a structural job as soon as a wall comes out or the room reaches into the garden. We survey, appoint the structural engineer where one is needed, build to the calculations issued, and coordinate the building control application and inspections. We never produce those calculations ourselves. This page covers two Slough specifics: how far you can go at the back, and what is underneath when you get there.
How far a kitchen extension can go at the back
Slough's guideline maximum depth for a single storey rear extension is 3.65 metres for a terraced house and 4.25 metres for a semi-detached or detached house, measured from the rear main wall of the original house. That figure decides whether an island fits, so it belongs in the conversation before the kitchen is designed rather than after.
Height is limited too. Where the extension abuts a residential boundary, Slough's guideline maximum is 3 metres for a flat roof, and 3 metres at the mid-point of the pitch at the side boundary for a pitched roof. That constrains the ceiling height and the rooflight detail on the boundary side, so settle it before the ceiling is drawn.
What the new floor is bearing on
The British Geological Survey takes the type section of the Langley Silt Member, its formal name for the Thames valley brickearth, from a gravel pit at Langley in Slough. BGS records the member as 1 to 5 metres thick with an average of 3 metres, varying from silt to clay, and notes that its previous name was Brickearth. A footing in that material behaves differently from a footing in gravel.
The answer changes across the borough. BGS 1:50 000 mapping shows the Shepperton Gravel Member, sand and gravel, over Lambeth Group bedrock across Cippenham. The Taplow Gravel Member appears to the north towards Burnham Lane, and the Langley Silt Member along the eastern edge towards Slough. That is why the trial hole comes before the price rather than after it.
Drainage decides how much garden you can build on
Slough Borough Council states that its minimum garden depths are set so that soakaways can be built for the correct disposal of surface water from approved extensions. It states that a soakaway needs to sit at least 5 metres from the completed extension. A kitchen extension roof produces surface water that has to go somewhere.
So the drainage strategy and the extension depth are one decision rather than two. We take the levels and the garden dimensions at survey and put them in front of the design, which costs less than moving a soakaway once the slab is down.
- New circuits and consumer unit work certified under Part P
- Bespoke kitchen design and 3D layout planning
- Handleless, shaker and in-frame door styles fitted
- Tiling, flooring and feature lighting
- Floor levelling and screeding before the flooring goes down
Why Choose GS Renovation in Slough
A kitchen is the room where the structure, the drainage, the electrics and the gas all land in the same few square metres, so the order of work decides the finish. We survey, appoint the structural engineer where the job needs one, and set the building control application and the inspections with Slough Borough Council against a written programme. Where the kitchen reaches into the garden, we take the depth, the height and the ground conditions off your plot before the units are chosen. We build to the engineer's calculations and never produce them ourselves. GS Renovation Ltd is fully insured and registered in England, company number 14611254, and rated 4.9 from 31 reviews on MyBuilder. Quotations are free and carry no obligation.
- Appliance and extraction routes agreed at design stage
- Registered in England, Companies House no. 14611254
- Services moved and tested before the units go in, not after
- A written scope and programme agreed before work starts
- Suppliers used across every budget, with options priced
- Materials priced at options, so you choose the finish