- Postcode districts
- RH12
- Nearby
- Crawley, Horley and Haywards Heath
- Guide price
- £800–£2,800
- Typical time on site
- 1–2 working days (added to a fit)
- Water
- Hard across most of West Sussex
- Survey
- Free, at your home
What does bathroom underfloor heating cost in Horsham?
As a guide, budget £800 to £2,800 including VAT for bathroom underfloor heating in Horsham; your written quote will pin it down. 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.
Electric mat
- Insulation board
Electric, larger room
- Electrician sign-off
Wet system
- Pipes linked to the heating
Guide prices for Horsham including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Horsham
We work right across Horsham — RH12 — and in neighbouring Crawley and Horley.
Homes in and around Horsham vary, so we look at the floor, the walls and the water system before we price anything. If your Horsham bathroom has a cold tiled floor and no room for a bigger radiator, an electric mat under new tiles is the simplest answer. We check door thresholds in Horsham homes at the survey, because underfloor heating and new tiles raise the floor slightly.
Water across much of West Sussex is hard. 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
- Bringing the system up to temperature gradually once the adhesive and grout have cured
- 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
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.
Floor finish
Tiles and stone pass heat through well. LVT and vinyl can work, but check the maximum floor temperature the flooring maker allows.
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.

