- Postcode districts
- W3, W4, W6
- Nearby
- Acton, Shepherds Bush and Fulham
- 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 Chiswick?
For Chiswick, 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 Chiswick including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Chiswick
As well as Chiswick itself (W3, W4 and W6), we survey in Acton, Shepherds Bush and Fulham.
In Chiswick, many bathrooms are in flats or converted houses, so we check lease consents, access and the floor below before we price. If your Chiswick bathroom has a cold tiled floor and no room for a bigger radiator, an electric mat under new tiles is the simplest answer. Whether your Chiswick bathroom is a small en-suite or a large main bathroom, the mat is sized to the open floor, not the whole room.
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
- The electric mat or cable laid to the open floor, kept clear of where the WC, bath and fixed furniture will sit
- A dial, programmable or smart thermostat, with the supply RCD protected, tested and certified by a qualified electrician
- A floor sensor set between the heating runs and wired back to the thermostat
- Insulation boards over the subfloor, so heat goes up into the tiles rather than down into the joists or screed
Decisions to make first
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.
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.
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.
