Flat Conversions Canary Wharf
Houses divided into self-contained flats in Canary Wharf, separating floors, a protected stair and separate services for every flat.
- Rated 4.9 from 31 reviews on MyBuilder
- London guide: £50,000 to £120,000
- Free site survey, itemised quote
Flat conversions in Canary Wharf start from an unusual position: the VOA counts 92% of homes across Canary Wharf, Millwall and Cubitt Town as flats already, and only 8% as houses. The houses that could be split are almost all terraces, and Tower Hamlets policy protects family homes. So a realistic E14 conversion keeps a family flat, needs planning permission, and is built with the fire and sound separation between units that building regulations demand.
In Canary Wharf, 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 Canary Wharf: 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.
Price guide
| Work | Indicative range |
|---|---|
| House into 2 to 3 flats in London, fees and build (Architectural Drawings) | £50,000 to £120,000 |
| Build cost per square metre, London (Architectural Drawings) | £1,000 to £2,000 |
| House into 2 flats, construction only, England-wide guide (Mayfair Studio) | £40,000 to £80,000 |
| Sound insulation and fire separation, England-wide guide (Mayfair Studio) | £5,000 to £15,000 |
| Separate utility connections, 3 flats, London (Architectural Drawings) | £3,000 to £6,000 |
Indicative ranges from published cost guides (Architectural Drawings and Mayfair Studio, 2026), not a quotation. Each row names its source and whether it is a London, UK or England-wide figure. Prices checked September 2026.
Quick estimate from published guides
Guide range: choose above
Why Tower Hamlets policy shapes every Canary Wharf house conversion
The Tower Hamlets Local Plan says proposals to convert family homes into smaller self-contained flats will be resisted unless the conversion enables the retention of a family unit. Policy D.H2 turns that into a test: the conversion is only permitted when a 3-plus bed unit is retained. For a Canary Wharf terrace that points to one large flat plus one smaller one, not a stack of studios. On a small two-storey terrace, keeping a 3-plus bed unit may leave no room for a second flat at all.
With houses at 8% of homes across the wider Canary Wharf, Millwall and Cubitt Town statistical area, almost all of them terraces, the stock to convert is limited, and each scheme is judged on whether it keeps family space. Splitting a house into flats is a material change of use, so it always needs planning permission, which you or your designer apply for. For the build, the family flat tends to take the garden and the ground floor, and the smaller flat sits above, so the separating floor between them becomes the critical piece of construction.
Housing in Canary Wharf
Count the homes in the Canary Wharf, Millwall and Cubitt Town statistical areas and you get about 22,070: 95% built since 1945, 2% between the wars and 2% before 1919, with flats at 92% and houses at 8%. Where most homes are flats, changing the number of flats in Canary Wharf needs the freeholder and usually planning.
Space standards for new flats in a Canary Wharf conversion
Every flat created in a Canary Wharf conversion counts as a new dwelling. The London Plan space standards table says a new dwelling includes new build, conversions and change of use. Policy D.H3 of the Tower Hamlets Local Plan then requires new development to meet the London Plan space and accessibility standards, including a minimum 2.5 metre floor-to-ceiling height. A converted terrace is measured against the same standard as a new block, so rooms with low ceilings need checking first.
Bedrooms have their own minimums under London Plan Policy D6: a single bedroom of at least 7.5 square metres and 2.15m wide, and a double or twin of at least 11.5 square metres. Policy D.H3 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 extra occupant. On a terrace the upper flat has no garden of its own, so a balcony or roof terrace may be needed to comply.
Fire and sound separation between the new Canary Wharf flats
The separating floor and walls are the heart of a Canary Wharf conversion. Each new flat needs fire separation from its neighbour and a protected escape route, under Part B of the building regulations, and the structural engineer checks whether the existing floor and its joists can carry the added build up. We close the ceiling, fill the void with insulation and lay the new floor to the specification building control approves.
Sound matters just as much. For flats formed by material change of use, Approved Document E sets a minimum of 43 dB airborne for walls, floors and stairs, and a maximum of 64 dB impact for floors and stairs. We build to the tested detail and leave access for pre-completion sound testing, because a failed test means reopening finished rooms. Part L applies to the new thermal elements, and each flat gets its own consumer unit, heating and water supply.
Meters, addresses, CIL and party walls on a Canary Wharf conversion
A Canary Wharf conversion creates new homes, and each one needs its own identity. Separate electricity and water supplies, meters and a postal address are arranged early, because the utilities and the council's street naming and numbering service work to their own timescales. A development that creates one or more new dwellings is potentially liable for Tower Hamlets CIL, although the charge is worked on net new floorspace, so you or your agent check the position and complete its forms before work starts.
Party walls come into play when a conversion cuts into or builds on a shared wall, for instance to add steel bearings, a new stair enclosure or fire lining fixed through to the party wall. The building owner serves notice on the neighbours under the Party Wall Act, and the works then proceed on the neighbour's written consent or under an award. We sequence the party wall items so they can start as soon as the notice period and any award allow.
- Insulation to the walls, roof and floors the conversion touches
- Flats converted back into a single family house
- Pre-completion sound testing arranged before sign-off
VOA Council Tax stock of properties, March 2025, for the Canary Wharf, Millwall and Cubitt Town statistical areas, which together cover the Isle of Dogs. Counts rounded by the VOA.
The GS Renovation Difference in Canary Wharf
A conversion is the job where sequence matters most, because the separating floor, the new stair enclosure and the two sets of services all have to be right before anything is closed up. We build the structure, fire separation, acoustic layers, kitchens and bathrooms as one programme, built to the structural engineer's floor design. Your designer or agent takes the planning route, and we give them a build programme and buildability comments on their drawings.
- Each flat's new electrics signed off by a registered electrician for Part P
- Free, no-obligation quotations
- Common parts, bin stores and cycle stores finished to the planning conditions
George was brilliant. Lovely bloke, very reasonably priced and a perfectionist to boot. He completed our small kitchen renovation with care and great…
Giorgio is an excellent and intelligent workman, and with very reasonable prices! He installed a kitchen extractor fan in a complicated situation…
George was very friendly and helpful from start to finish. He worked really hard to ensure our kitchen was installed to a high standard and was…
FAQ
Frequently Asked Questions about Flat Conversions Canary Wharf
Why do flat conversion quotes in Canary Wharf vary?
Because the scope differs. One includes separating floors built to pass the sound test, a protected stair, separate meters and fire stopping; another prices them as extras. The England-wide guide of £40,000 to £80,000 in construction for a straightforward two-flat split (Mayfair Studio, 2026) is a starting point. Compare Canary Wharf quotes against the approved drawings.
Can a Canary Wharf terrace be converted into two flats?
Possibly, if a family unit is kept, and only with planning permission. Policy D.H2 of the Tower Hamlets Local Plan only permits the conversion of family homes when a 3-plus bed unit is retained in the new development. Your designer tests the layout against that rule before the application. We then build the separating floor, stair and services to the approved plans.
What order does a Canary Wharf flat conversion follow on site?
Strip out comes first, then any structural work to the engineer's design, such as new bearings or a stair enclosure. Next come the separating floor and walls, first fix of the two sets of services, fire linings and insulation, then plaster, second fix, kitchens, bathrooms and decoration. The fire and sound layers are inspected before they are covered, so building control visits are booked into that order rather than added at the end.
Is the space standard a building regulation?
No. GOV.UK says the Nationally Described Space Standard is not a building regulation and sits solely within the planning system. In Tower Hamlets it bites through the Local Plan and London Plan Policy D6 when the conversion goes for planning, so the room sizes are fixed at the design stage rather than checked by the building inspector.
What paperwork does each new Canary Wharf flat need at completion?
Each flat needs a building control completion certificate, the electrical installation certificate from the registered electrician, gas safety paperwork where gas is used, and the pre-completion sound test results for the separating floor and walls. Tower Hamlets building control inspects at the end of the work before it signs off. We gather those documents into one pack, because a buyer's solicitor or lender for each flat will ask for them.
Does a flat conversion in Canary Wharf pay CIL?
It can. A development in Tower Hamlets is potentially liable for CIL if it contains at least 100 square metres of new build floor space or creates one or more new dwellings. Converting one house into two flats creates a new dwelling, but the charge is worked on net new floorspace, and existing floorspace in lawful use is normally deducted, so a split with no extension often pays little or nothing. You or your agent check the liability and complete the forms before work starts.
Does a Canary Wharf flat conversion need building regulations approval as well as planning?
Yes. Planning permission decides whether the flats can exist, and building regulations decide how they are built. Converting a house into flats is a material change of use, which brings in Part B fire separation and escape, Part E sound insulation with pre-completion testing, and Part L for renewed thermal elements. Tower Hamlets needs a commencement notice two working days or more before the start.
Can a converted Canary Wharf house be turned back into one home?
Sometimes. Going from two flats back to one house loses a dwelling, and in most London boroughs that needs planning permission, so your designer confirms the Tower Hamlets position before anything is designed. The building work removes the second kitchen, merges the services onto one supply and meter, and reopens the stair to the whole house. The separating floor can often stay in place, which keeps the job smaller than the original conversion.
Who sets up the leases for the new Canary Wharf flats?
Your solicitor. Once the flats exist, each one is usually sold or let on a new lease, which sets who repairs the structure, the roof and any shared entrance. We give your solicitor and designer the as-built details, the service routes and the certificates, because the leases, the new addresses and any buyer's lender all depend on an accurate record of what was built.
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