Flat Conversions Slough

Converting a Slough house into self-contained flats is shaped more by policy than by the building. Houses make up 63% of Slough's homes, and Core Policy 4 of the Core Strategy allows no net loss of family accommodation through flat conversions. So the planning case comes first, and the layout follows from it. Once you or your designer hold the consent, we build the separating floors and walls, the protected stair, separate services and the new kitchens and bathrooms to the approved drawings.

For Slough, converting a house into two or three flats is published at £50,000 to £120,000 including professional and council fees, and an England-wide guide puts a straightforward two-flat split at £40,000 to £80,000 in construction alone, which is the part a builder prices (Architectural Drawings and Mayfair Studio, 2026); a Berkshire price follows a site visit. GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Slough: we build the conversion to the approved drawings, building control inspects the fire and sound separation, and a registered electrician certifies each flat's electrics.

Why Slough protects family houses from flat conversions

Start with the family housing test. Core Policy 4 of Slough's Core Strategy allows no net loss of family accommodation as a result of flat conversions, changes of use or redevelopment. Splitting a house into self-contained flats always needs planning permission, which the owner or their designer applies for, and that test is the first question the application has to answer. A scheme that keeps a family sized unit, such as a ground floor maisonette with the garden, is a different proposition from one that removes it.

The council's own reading of the borough explains the stance. Slough's Core Strategy names the pressure on existing residential areas from infilling, extensions and outbuildings known as Slough Sheds, and says much of it is fuelled by demand for larger family housing. A conversion drawing that simply multiplies bedrooms on a small plot can expect resistance. We price and programme a scheme only once your designer has a planning position, because the approved layout changes the structural work considerably.

Housing in Slough

The valuation list shows roughly 57,360 homes in Slough, of which 5% are pre-1919, 20% interwar and 73% post-1945, split 37% flats to 63% houses. Terraced houses make up 34% of homes here, and a converted terrace in Slough has two party walls to consider for sound.

Which Slough houses and buildings suit conversion

The candidates in Slough are the larger houses and the older commercial buildings, rather than a small terrace. Terraced houses are 34% of Slough's homes and semis and detached houses 27%, and only 5% of all homes predate 1919. A small interwar terrace rarely has the floor area to give two decent flats and still satisfy the family housing policy. The larger villas at Upton or a detached house on a big plot are more realistic starting points.

Commercial buildings follow a separate test. Saved policy H11 permits converting commercial properties to homes in Slough only where independent access, satisfactory room sizes and layouts, and sound insulation between units are achieved. A floor above a shop needs its own front door from the street, not a route through the shop. The national minimum internal floor areas for new homes are the usual yardstick for satisfactory room sizes, so your designer checks each flat against them before the drawings go in.

Separating the flats: fire, sound and the Slough building control route

A conversion is really a job about the floors and walls between homes. Forming flats is a material change of use, so Part B fire separation and escape and Part E sound insulation apply. Each flat needs fire resisting construction from its neighbours and a protected route to the street, and each separating floor and wall needs a pre-completion sound test. We build the upgraded floors with resilient bars, insulation and a fire rated ceiling, all to the approved details.

Slough Borough Council runs its own building control service, with a full plan check, a building notice or regularisation among its routes. For a conversion the detailed route is the sensible one, because fire and sound details need approving before we build them. Slough also warns that building regulations restrict windows and openings in a wall on a boundary for fire safety, which affects a new side window lighting a flat's living room or bedroom.

Services, EPCs, neighbours and reversing a Slough conversion

Separate homes in Slough need separate records. Slough Trading Standards advises that a building altered into separately used dwellings may need an EPC for each one, where each has its own entrance, facilities and heating system. That affects how you plan the heating: one boiler per flat or a shared system. We run services per flat where the scheme calls for it, and the meters and postal addresses are arranged with the suppliers and the council's street naming team.

Neighbours come in where party walls are cut into. Slough Borough Council states that applicants must comply with the Party Wall Act, and the building owner serves any notice. The reverse job, combining flats back into one house, also needs care. It restores family accommodation, which Core Policy 4 protects, but it removes a dwelling, and merging flats can need planning permission in its own right. Settle the planning position with your agent first. The separating floors can often stay as sound insulation.

• House to flat conversions into two or more self-contained units
• Decoration, flooring and making good throughout, ready to let or sell
• A kitchen and shower room fitted in every new flat

VOA Council Tax stock of properties, March 2025, for all 15 statistical areas in Slough. Counts rounded by the VOA.

Plenty of Slough projects start with one job and grow, so it helps to see structural alterations in Slough, flat conversions in Windsor, building control sign-off for a conversion, refurbishing a flat that has already been converted, how we handle flat conversions across London and Structural Engineer Report Cost.

Why Choose GS Renovation in Slough

Conversions go wrong at the join between the drawing and the building: a stair that does not give the escape route, a floor that fails its sound test, a flat without its own entrance. We build from the approved drawings, so the structure, fire separation, sound insulation, services and fit-out all meet the same target. A structural engineer designs any steel, building control inspects each stage before it is covered, and you receive the certificates for every flat at handover.

• Every flat checked against the space standard before the layout is priced
• Each flat's new electrics signed off by a registered electrician for Part P
• Free follow-up visit after completion if anything needs attention

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.