Flat Conversions Tower Hamlets

Flat conversion in Tower Hamlets starts from policy rather than plans. Policy D.H2 of the Local Plan only permits the conversion of family homes when a 3-plus bed unit is retained, so a scheme that splits a house entirely into small flats will be resisted. Houses are 10% of the stock and terraced houses 9%, so the candidates are few and nearly always terraces. We build conversions to the planning consent the owner holds, with fire separation and sound insulation between every flat.

In Tower Hamlets, 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 Tower Hamlets: 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.

What the Tower Hamlets Local Plan allows when a house is split

A family house in Tower Hamlets can be split into flats only with planning permission and only if a family unit survives the conversion. Policy D.H2 permits the conversion of family homes when a 3-plus bed unit is retained in the new development. The Local Plan adds that proposals to convert family homes into smaller self-contained flats will be resisted unless the conversion enables the retention of a family unit. A layout that satisfies this keeps a family-sized lower maisonette with the garden and adds a smaller flat above.

The London Plan counts that kind of project. Its small sites supporting text lists residential conversions among the forms of incremental intensification that count where they result in net additional housing. So a conversion that keeps a family home and adds one more flat is the shape policy supports. The owner's designer prepares the application and the planning case, and we price the build from the drawings once the layout has been tested against the policy.

Housing in Tower Hamlets

Around 149,830 homes make up Tower Hamlets on the valuation list; 90% are flats and 10% houses, and 12% date from before 1919, 4% from between the wars and 83% from after 1945. Since most homes here are flats, changing the number of flats in Tower Hamlets needs the freeholder and usually planning.

Space standards every new Tower Hamlets flat must meet

Every flat created in a Tower Hamlets conversion has to meet the space standards, because the London Plan treats a conversion as a new dwelling. Policy D.H3 requires new development to meet the latest London Plan space and accessibility standards, including a minimum 2.5 metre floor-to-ceiling height. It also asks for at least five square metres of private outdoor space for a 1 to 2 person flat plus one square metre for each additional occupant.

Bedrooms have minimums of their own. Under London Plan Policy D6 a one-bedspace single bedroom must be at least 7.5 sq.m and 2.15m wide, and a double or twin must be at least 11.5 sq.m. The same policy asks for dual aspect homes to be maximised and single aspect ones normally avoided. In a narrow terrace, the ceiling height in the roof and the width of the back bedroom often decide whether a top-floor flat works, so we measure both before the layout is drawn.

Fire and sound between flats in a Tower Hamlets terrace

The houses available to convert in Tower Hamlets are overwhelmingly terraces: terraced houses make up 9% of homes, and 12% of homes date from before 1919. An older terrace's timber floors and lath ceilings give little fire or sound separation between storeys. Each new flat therefore needs a fire-resisting floor and ceiling build, protected escape through the common stair and self-closing fire doors onto it, all to Part B of the building regulations and inspected before the ceilings close.

Sound between flats is the other half. Approved Document E sets lower performance for flats formed by material change of use: 43 dB airborne for walls, floors and stairs, and 64 dB maximum impact for floors and stairs. We build independent ceilings, resilient layers and mineral wool into the existing floors to reach those figures, and seal the junctions at the walls. Pre-completion sound testing follows, so the test dates go into the programme from the start.

Services, addresses, CIL and neighbours in a Tower Hamlets conversion

Each new flat needs its own services and its own address. That means separate electricity meters and consumer units, a separate gas supply or electric heating, water arranged with the supplier, and a new address through the council's street naming and numbering. Work under a building regulations application needs a commencement notice to Tower Hamlets Council at least two working days before starting, and we set the notice date into the programme.

A conversion that creates a new dwelling in Tower Hamlets is potentially liable for CIL, so the owner checks liability with the council before starting work. Where the build cuts into or builds on a party wall, the Party Wall Act applies: the building owner serves notice at least two months ahead, and the work goes ahead on written consent or a surveyor's award. The reverse project, turning flats back into one house, loses homes, and your designer confirms whether that needs planning permission before any work is priced.

• Decoration, flooring and making good throughout, ready to let or sell
• Flats converted back into a single family house
• Separating walls built and lined for sound between flats

VOA Council Tax stock of properties, March 2025, for all 34 statistical areas in Tower Hamlets. Counts rounded by the VOA.

Work in Tower Hamlets rarely sits on its own, so you may also want structural alterations in Tower Hamlets, our Tower Hamlets area guide, a building contractor for the whole conversion, the Party Wall Act when a conversion cuts a shared wall, our London flat conversions page and Renovation Budget & Contingency.

Why Choose GS Renovation in Tower Hamlets

A flat conversion in Tower Hamlets has to satisfy planning, building control and sound testing before anyone moves in. The separating floors and the sound test are what decide whether the flats can be completed on time. We build to the consent the owner holds, give the owner's designer the site information and programme they need, and price from the approved drawings with a written quotation. You keep one contact from the first strip-out through to the sound test and completion.

• Separating floors built to the acoustic detail the sound test checks
• Each flat numbered and supplied before the keys are handed over
• Registered in England, Companies House no. 14611254

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.