Flat Conversions Brent

Flat conversion in Brent is shaped by a Local Plan that protects family houses. Houses are 38% of Brent homes, and Policy BH11 only lets a family home of 3 or more bedrooms be split into two or more dwellings where all its criteria are met. Splitting a house into self-contained flats always needs planning permission, and each flat must meet the London Plan space standards as a new dwelling. We build the separating floors, walls, escape routes and new flats to the consent you hold.

In Brent, 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 (indicative London ranges, Architectural Drawings and Mayfair Studio, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Brent: 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.

When Brent allows a family house to become flats

Brent allows a family house to be split only when it meets every test in Local Plan Policy BH11. The existing home must be 130 square metres or more, or acceptably extendable to that size, and the scheme must include at least one 3-bedroom dwelling. That means the minimum outcome is a family flat plus a smaller unit, not a stack of studios, and the house size is checked before any design work is paid for.

The acceptably extendable wording can allow a rear addition to be drawn into the same scheme to reach the size threshold. The build then runs in a set order: structural works and any extension, the separating floor and walls, then the new kitchens, bathrooms and services for each flat. We price the whole sequence as one job from the approved drawings, so the extension and the conversion do not fight each other on site.

Housing in Brent

The stock in Brent runs to roughly 135,080 dwellings, 62% of them flats and 38% houses, built 28% before 1919, 32% between 1919 and 1939 and 40% after 1945. Where most homes are flats, changing the number of flats in Brent needs the freeholder and usually planning.

Space standards every new Brent flat must meet

Every flat created in a Brent conversion counts as a new dwelling for space standards. The London Plan space standards table says a new dwelling includes new build, conversions and change of use. Policy D6 then sets a minimum floor to ceiling height of 2.5m for at least 75 per cent of each flat's internal area. In an older house with a low top floor, that height rule can decide how many flats are possible.

Room sizes follow the same standard. Under Policy D6 a single bedroom must be at least 7.5 square metres and 2.15m wide, and a double or twin must be at least 11.5 square metres. D6 also asks for dual aspect flats where possible and, where the borough sets no higher standard, at least 5 square metres of private outdoor space for a 1 to 2 person flat plus 1 square metre for each extra occupant. These are planning tests, not building regulations, so your designer fixes the layout before the application goes in, and we set out partitions from the approved drawing.

Fire separation and sound between Brent flats

Fire separation and sound insulation are the heart of any Brent flat conversion. Under Part B each flat needs fire resisting floors and walls between it and its neighbours, a protected escape route, fire doors onto the common stair and smoke detection. In a Brent house built before 1919, with timber floors and lath and plaster ceilings, that means new fire rated boarding, fire stopping around pipes and cables, and new doors and linings on the stair.

Sound is set by Approved Document E, which for flats formed by material change of use asks for 43 dB airborne insulation for walls and floors and a 64 dB maximum for impact on floors. We build independent ceilings, resilient bars, acoustic insulation and floor treatments to meet those figures, and pre-completion sound testing checks the result. In a Brent terrace, getting the separating floor right is what keeps the flats lettable and quiet.

Meters, addresses and building control for a Brent conversion

A Brent conversion is a material change of use, so the whole job goes through building control, with Brent Building Control or a registered approver. Because the finished building will have common parts covered by the Fire Safety Order, a building notice cannot be used; the conversion goes on full plans with Brent Building Control or through a registered building control approver. Approved plans stay valid for three years, after which a new application is needed if work has not started, so the start date matters once approval is in hand.

Each new flat needs its own services and identity. That means separate electricity supplies and meters, separate heating, usually a new boiler or heat pump per flat, and water arrangements agreed with the supplier. Street naming and numbering gives each flat its postal address. Where a party wall is cut into or built on, the building owner serves notice under the Party Wall Act. We programme meter and supply dates early, because utility connections set the handover.

• Bin stores, cycle stores and external works to the planning conditions
• Fire detection in every flat and the common hall, laid out to the fire strategy
• Separating walls built and lined for sound between flats

VOA Council Tax stock of properties, March 2025, for all 35 statistical areas in Brent. Counts rounded by the VOA.

People planning flat conversions in Brent may also want structural alterations in Brent, our Brent area guide, builders in London who take on conversions, renovations across London, how we handle flat conversions across London and House Rewire Cost.

Why Choose GS Renovation in Brent

A flat conversion is a sequence of structural, fire, sound and services work that is inspected at each stage. We build to your planning consent and building regulations drawings, work to the structural engineer's design, and keep the fire and acoustic details as drawn so the flats are ready for the sound test and final inspection. You get a written, itemised quotation after a site visit, with anything uncertain shown as a provisional sum, and a written programme. The owner or their designer handles the planning application, and we supply the programme they need.

• Separating floors built to the acoustic detail the sound test checks
• One point of contact on the phone, not a call centre
• Fire strategy for the stair and each flat entrance settled before strip-out

Reviewed jobs near Brent

1 MyBuilder review from Wembley, with each customer's own job title:

• Install new worktop, Wembley, 10 Jul 2024 (5 out of 5)

Read all 31 on our reviews page.

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.