Bathroom
renovation
in St John's Wood, NW8
Designers, Architects, Engineers & Builders Under One Roof.
One Studio. One Contract. One Team.
Bathrooms in St John's Wood sit in Italianate villas and in Victorian, Edwardian and interwar mansion blocks, and a leasehold flat's lease can make any alteration conditional on the landlord's permission. With some 470 listed buildings in the conservation area, we also check whether original detail and historic fabric around the room is protected before fittings are chosen.
What a St John's Wood bathroom may need approval for
Replacing a bath, WC, basin or sink is one of the exempt jobs that gov.uk says can go ahead without building regulations approval. Adding power or lighting points, or changing circuits, is exempt too except around baths and showers, and repairing or replacing a heating system is not exempt.
In a leasehold flat, LEASE notes that the terms of the lease can mean asking the landlord before altering anything, a step that planning permission or building regulations approval does not replace.
Where the building is listed, City Plan Policy 44 looks for its original or significant detail and historic fabric to be protected, or restored where appropriate, so we check the list entry before tiling over an old floor or boxing in a cornice.
Sources: GOV.UK: when you don't need building regulations approval, LEASE: alterations and home improvements, Westminster City Plan 2019-2040 (2026, adopted January 2026)
Mansion blocks, villas and the work around a bathroom
Victorian, Edwardian and interwar mansion and flat blocks are characteristic of St John's Wood: Westminster's audit places them in a swathe through the centre, on Wellington Road and Circus Road, and around the edge of the conservation area. The houses are generally two or three storeys over a basement.
Every contractor working in Westminster is expected to keep to the spirit of the council's construction code: working hours, keeping disruption low and letting neighbours know what is happening. Delivery vans and waste collections must run within the site working hours agreed with the council unless it agrees otherwise, and nothing heavy, a skip included, goes over a pavement vault until the structure beneath has been considered.
Sources: Westminster City Council: St John's Wood Conservation Area Audit SPD, Westminster City Council: Code of Construction Practice (May 2026)
A bathroom in a mansion flat
Mansion-flat bathrooms are usually stacked one above another, sharing a soil stack. Keeping the WC close to the stack avoids a pump; moving it further needs enough floor depth for the waste to fall.
LEASE notes that other clauses can restrict work even where a lease allows alterations, such as a requirement for carpeted floors.
We lay tiles on a decoupling layer over an acoustic underlay so footsteps and taps carry less to the flat below, and fit an access panel so the shared pipework can still be reached.
Source: LEASE: alterations and home improvements
Adding bathrooms to a villa
A villa of two or three storeys over a basement often has one main bathroom and a scatter of later WCs. Adding en-suites usually means taking space from a dressing room or a small bedroom, and finding a route for the waste down through the floors.
More bathrooms need more hot water. We check whether the boiler, the cylinder and the incoming main can serve several showers at once before the layout is fixed.
Bathrooms in listed rooms
In a listed house, a bathroom is often designed so it could be taken out again: a freestanding bath and basin set off the walls, pipes run in a raised floor rather than chased into plaster, and joinery panels fixed to new grounds.
We agree the extract route and any new opening with Westminster before work starts, because a vent on the front of a listed building, or a cut through a decorated ceiling, may need consent.
Lighting, storage and fresh air
Bathrooms in mansion flats are often internal, with no window. We light them in layers, with a dimmable ceiling light, a mirror light at the basin and a low night light, and run a quiet extract fan on a humidity sensor so steam clears without anyone remembering to switch it on.
Recessed cabinets between the studs, a vanity with deep drawers and a heated towel rail on its own circuit keep the room clear. Where the bathroom has a window, it is kept clear of the shower so the timber does not suffer.
En-suites, cloakrooms and guest bathrooms
An en-suite carved from a dressing room needs a door that does not swing into the bed, a shower sized to the space rather than the brochure, and an extract that runs through the ceiling void rather than across the front of the house.
A ground-floor cloakroom under the stair is often the hardest room to drain. We confirm the waste route and the headroom before the basin and WC are chosen, and use a wall-hung pan where it gives a little more floor.
A guest bathroom on the top floor is planned with the loft or roof work if that is happening too, so the pipes and the extract are run once.
Showers, pressure and waterproofing
A rainfall shower needs both flow and pressure. Where the mains is weak, an unvented cylinder or a pump may be needed, and we measure the supply on the first visit.
Walk-in showers and wet rooms are tanked with a waterproof membrane under the tiles and tested before tiling. Underfloor heating dries the floor quickly and frees the walls of radiators.
How a St John's Wood bathroom is planned
After the feasibility visit we measure the bathroom, follow its supply, waste and extract runs back to where they connect, and go through the lease and the list entry. The room, the vanity and its storage are drawn as one by our in-house designers; if a joist or loadbearing wall has to change, our in-house structural engineers design it.
In a mansion flat we settle the connection to the shared stack, any shutdown of shared services and the lift bookings with the managing agent; in a villa we plan the waste and vent runs floor by floor. A written quotation is agreed before work begins, and vanity units or fitted storage can be made by our joinery team.
Bathroom renovation in St John's Wood: questions
Can I move a bathroom within a St John's Wood mansion flat?
Possibly. Whether the landlord has to approve it depends on the lease, and LEASE points out that this applies whatever planning or building regulations approval exists. We read the lease and trace the route to the shared stack before the room is set out.
Do I need a parking suspension for a skip?
Westminster lets you apply to suspend a parking bay for a skip delivery or building works. Requests need 10 working days' notice, applications that arrive within 10 calendar days of the start pay a short-notice fee, and a skip on the highway is licensed separately.
Can bathroom work run in the evening or at the weekend?
Westminster limits building work to 6pm on weekdays and 1pm on Saturdays, when its noise thresholds are also lower, and Sundays and bank holidays are off limits for noisy work unless special permission is granted. For noisy work outside those hours, the contractor must first obtain the council's Section 61 consent (Control of Pollution Act 1974).
Can I have a wet room in a St John's Wood flat?
Often, if the floor can be built up or lowered for the drain fall and the lease allows the change. We check both, and the floor's sound performance, before designing it.
How much does a bathroom renovation in St John's Wood cost?
In St John's Wood a bathroom's cost comes down to the stack, the lease and the floor beneath it. Distance to the shared stack, the extract path and the build-up allowed above a neighbour's ceiling usually matter more than the fittings, and a managing agent may set the working hours. We check those on a feasibility visit; once the scope and specification are agreed you get a written quotation.
Sources: LEASE: alterations and home improvements, Westminster City Council: parking bay suspensions, Westminster City Council: Code of Construction Practice (May 2026), Westminster City Council: noise problems we can investigate
St John's Wood bathroom work, and a house nearby
Close by in Belsize Park, NW3, a whole-house refurbishment:
Rooms and elevations typical of St John's Wood
Design, joinery and the build, under one contract in St John's Wood
The same team stays with the project from the first visit to handover. Our in-house architects, designers and structural engineers draw and specify the work. Master joiners make the fitted furniture. Building Regulations approval comes from the building control body appointed for the project. Independent surveying is a separate appointment: Hampstead Chartered Surveyors & Building Consultancy, our RICS-regulated sister practice, is a separate firm that a homeowner instructs directly. One JCT contract covers the building work. Electrical and gas work is carried out by appropriately registered engineers. Completed structural work carries a 12-month aftercare/defects period. Cover is £5M public liability, £10M employers' liability and contractors' all risks cover. Main office: 250 Finchley Road, Hampstead, London NW3 6DN. Central London client consultation address: 2 Eaton Gate, Belgravia, London SW1W 9BJ. Telephone 020 7101 3168.
Licence to alter · Independent surveying by our sister practice
What clients have said about the work
I would like to thank Ross and his team for their consistent commitment to quality and their unerring reliability.
We have worked with Ross and his company many times. They are extremely professional and hardworking individuals who can work under any circumstances. There was no variation to the works.
Verified Planning, Estate & Conservation Sources
- GOV.UK: when you don't need building regulations approval
- LEASE: alterations and home improvements
- Westminster City Plan 2019-2040 (2026, adopted January 2026)
- Westminster City Council: St John's Wood Conservation Area Audit SPD
- Westminster City Council: Code of Construction Practice (May 2026)
- Westminster City Council: parking bay suspensions
- Westminster City Council: noise problems we can investigate
Related pages
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