Single Storey Extensions — Slough SL1
Rear Extension in Slough — 1930s Semi-Detached Kitchen Extension
Location
Slough, SL1
Project Type
Single Storey Extensions
Duration
10 weeks on site
Scope
Rear extension, pitched roof, brick match, structural opening, first fix
The Brief
A 1934-built semi-detached in Slough, SL1 — a property type that is extremely common in this area, built during the inter-war expansion of Slough as a manufacturing centre. The original kitchen was at the rear of the house, measuring 8 square metres. The clients wanted to push the rear wall back by 3.5 metres to create a practical kitchen with space for a dining table and bifold access to the rear garden.
Our Approach
A 3.5m rear extension on a semi-detached property sat within standard permitted development limits. No planning application was required. Slough Borough Council Building Control notified. Strip foundations to 900mm were confirmed appropriate by visual inspection of the existing foundations during preliminary groundworks — good firm gravel sub-soil beneath the topsoil, no made ground issues.
The Build
Groundworks excavated, foundations poured at 900mm. Drainage: the existing kitchen waste run was extended under the new slab to the existing stack. The outer leaf of the extension was built in Ibstock Anglian Mixture facing brick — a close match to the original 1930s brick still in good condition on the rear elevation. Inner leaf: 100mm Thermalite Turbo blocks with full-fill Rockwool RWA45 insulation. The roof pitch was matched to the existing rear slope — a 30-degree pitch in Marley Eternit Mendip concrete tiles in Smooth Grey, matching the existing rear slope. The structural opening from the existing kitchen into the extension was formed using a 150x75 UC RSJ on padstones. Lead soakers and stepped flashing at the junction with the existing rear wall. First-fix electrics: kitchen lighting and socket circuits.
Materials & Specification
Facing brick: Ibstock Anglian Mixture. Inner block: Thermalite Turbo 7N. Cavity insulation: Rockwool RWA45. Roof tile: Marley Eternit Mendip Smooth Grey. RSJ: 150x75 UC section. Lead: code 4 sheet lead soakers and flashing.
The Result
The extension added 14 square metres, transforming the kitchen from a cramped galley into a practical kitchen/dining room with bi-fold doors to the garden. The pitched roof and brick match make the extension indistinguishable from the original house on the rear elevation — a deliberate choice by the client who wanted the addition to look as though it had always been there.
Project Photos
Project photo 1
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Project photo 3
Photos from this project will be added shortly. View our project gallery for completed work examples.
Project FAQs
Did this need planning permission?
No. A 3.5m rear extension on a semi-detached property is within standard permitted development limits. We confirmed this at the initial visit.
How important is brick matching on a 1930s property?
Very. 1930s Slough properties typically used a distinctive orange-red facing brick. An extension in the wrong brick stands out immediately. We spent time identifying the closest current production brick to the original before quoting.
How long did the project take?
10 weeks on site.
Why Choose Berkshire Bespoke Builders
- ✓Owner-managed — Pind Sahota is on site and managing your job personally
- ✓32 years on the tools — time-served builder, 25 years fitting bespoke kitchens
- ✓Fully insured — public liability and employer's liability on every project
- ✓Fixed-price written quotes — itemised by material and labour, no hidden extras
- ✓Building regs managed — we submit applications and attend all inspection stages
- ✓Based in Berkshire — Binfield, Bracknell RG42. No travel surcharges or delays
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