- Postcode districts
- SL4
- Nearby
- Slough, Egham and Staines
- Guide price
- £2,000–£5,000
- Typical time on site
- 2–4 working days
- Water
- Hard across most of Berkshire
- Survey
- Free, at your home
What does a cloakroom or downstairs WC cost in Windsor?
Guide price in Windsor: £2,000–£5,000 including VAT, depending on the room and what you choose. Prices in South East England run at about 12% 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 Windsor including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Windsor
As well as Windsor itself (SL4), we survey in Slough, Egham and Staines.
In Windsor, as anywhere, the age of the house decides a lot: pipe sizes, floor construction and where the soil stack runs. For a new cloakroom in Windsor, the first thing we look at is where the nearest drain or soil stack runs. If your Windsor cloakroom has no window, we size and duct the extractor fan so the room clears properly.
Most of Berkshire has hard water. 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
- An extractor fan ducted to outside, wired with an overrun timer or linked to the light
- Splashback or feature tiling and a new floor, often LVT or porcelain
- Compact sanitaryware: a short-projection, back-to-wall or wall-hung WC and a corner, wall-hung or slim vanity basin
- A concealed cistern frame or WC unit where the space allows
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.
Macerator or gravity
Gravity drainage is silent and needs no maintenance. A macerator lets a WC go where a pipe could not otherwise fall, provided another WC in the house is on gravity drainage.
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.

