- Postcode districts
- SW3, SW7, SW10
- Nearby
- Battersea, Fulham and Shepherds Bush
- Guide price
- £2,200–£5,600
- Typical time on site
- 2–4 working days
- Water
- Very hard across most of Greater London
- Survey
- Free, at your home
What does a cloakroom or downstairs WC cost in Chelsea?
For Chelsea, our guide range for a cloakroom or downstairs WC is £2,200 to £5,600 including VAT. Prices in London run at about 25% above the national guide, mainly because of labour rates. The figure depends on the size of the room, whether anything moves, and the products you pick.
Refit
- Existing downstairs WC
Upgrade
- Vanity basin with storage
New cloakroom
- Extractor fan to regulations
Guide prices for Chelsea including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Chelsea
We work right across Chelsea — SW3, SW7 and SW10 — and in neighbouring Battersea and Fulham.
In Chelsea, many bathrooms are in flats or converted houses, so we check lease consents, access and the floor below before we price. Where your Chelsea home already has a WC on gravity drainage, a macerator opens up more places a new cloakroom can go. For a new cloakroom in Chelsea, the first thing we look at is where the nearest drain or soil stack runs.
Water across much of Greater London is very hard. Taps, plug wastes and toilet pans scale up quickly, so chrome copes better than matt black, and a removable aerator is worth having. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- Lighting wired by a qualified electrician, tested and certified
- An extractor fan ducted to outside, wired with an overrun timer or linked to the light
- A concealed cistern frame or WC unit where the space allows
- A survey that checks the headroom under the stairs, the door swing and how the waste will reach the drain
Decisions to make first
Under-stair layout
Headroom drops quickly under stairs. The basin and the space in front of the WC need standing height; the low end of the room can take the cistern or storage.
WC style
A wall-hung WC on a frame gives the most floor space and looks neat. A back-to-wall pan in a short furniture unit is easier to fit against an uneven wall.
Rules that apply in England
In England, a new WC connected to the soil stack or drain is drainage work under Part H, and a newly formed cloakroom without an opening window should have mechanical extract; Approved Document F gives 6 litres per second as the design rate for a WC, against 15 for a bathroom. Because a cloakroom has no bath or shower, adding a light to an existing circuit is not notifiable under Part P, but a new circuit is.

