- Postcode districts
- CR5, CR8, SM7
- Nearby
- Purley, Banstead and Sutton
- Guide price
- £900–£3,100
- Typical time on site
- 1–2 working days (added to a fit)
- Water
- Very hard across most of Greater London
- Survey
- Free, at your home
What does bathroom underfloor heating cost in Coulsdon?
For Coulsdon, our guide range for bathroom underfloor heating is £900 to £3,100 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.
Electric mat
- Insulation board
Electric, larger room
- Electrician sign-off
Wet system
- Pipes linked to the heating
Guide prices for Coulsdon including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Coulsdon
As well as Coulsdon itself (CR5, CR8 and SM7), we survey in Purley, Banstead and Sutton.
In Coulsdon, many bathrooms are in flats or converted houses, so we check lease consents, access and the floor below before we price. For Coulsdon homes having the bathroom floor replaced, underfloor heating adds one to two days to the fit. If your Coulsdon home has a suspended timber floor, insulation boards under the mat stop heat disappearing into the void below.
Most of Greater London has very hard water. Hard water leaves white marks on dark grout and gloss tiles, so matt finishes and stain-resistant grout are the practical choice. Hardness varies street by street, so check the figure for your postcode with your water supplier.
What the job includes
- Insulation boards over the subfloor, so heat goes up into the tiles rather than down into the joists or screed
- The electric mat or cable laid to the open floor, kept clear of where the WC, bath and fixed furniture will sit
- A floor sensor set between the heating runs and wired back to the thermostat
- Bringing the system up to temperature gradually once the adhesive and grout have cured
Decisions to make first
Mat or loose cable
Mats are quickest on square, open floors. Loose cable is easier to route around awkward shapes, pipe boxing and a curved shower area.
Insulation board thickness
Thicker boards warm up faster and lose less heat downwards, but raise the floor; the right choice depends on the door threshold and the next room.
Rules that apply in England
In England, a new circuit for underfloor heating is notifiable under Part P, and so is connecting it to an existing circuit in a room with a bath or shower. The electrician either self-certifies through a competent person scheme or the work is notified to building control.
