- Postcode districts
- KT12, TW16, TW17
- Nearby
- Walton-on-Thames, West Molesey and Ashford
- Guide price
- £800–£2,800
- Typical time on site
- 1–2 working days (added to a fit)
- Water
- Hard across most of Surrey
- Survey
- Free, at your home
What does bathroom underfloor heating cost in Sunbury-on-Thames?
Our guide price for bathroom underfloor heating in Sunbury-on-Thames is £800–£2,800 including VAT. We adjust the national guide for South East England, where prices are typically about 12% above the UK average. The figure depends on the size of the room, whether anything moves, and the products you pick.
Electric mat
- Mat under the tiles
Electric, larger room
- Programmable smart thermostat
Wet system
- Screed or low-profile boards
Guide prices for Sunbury-on-Thames including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Sunbury-on-Thames
We work right across Sunbury-on-Thames — KT12, TW16 and TW17 — and in neighbouring Walton-on-Thames and West Molesey.
Homes in and around Sunbury-on-Thames vary, so we look at the floor, the walls and the water system before we price anything. We check door thresholds in Sunbury-on-Thames homes at the survey, because underfloor heating and new tiles raise the floor slightly. If your Sunbury-on-Thames home has a suspended timber floor, insulation boards under the mat stop heat disappearing into the void below.
Most of Surrey has 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
- A dial, programmable or smart thermostat, with the supply RCD protected, tested and certified by a qualified electrician
- For wet systems, pipes in low-profile boards or screed connected to a manifold or single-zone kit, with any boiler work done by a Gas Safe registered engineer
- A floor sensor set between the heating runs and wired back to the thermostat
- Resistance and insulation tests on the mat before, during and after tiling, with the readings recorded
Decisions to make first
Floor heating and towel rail
Underfloor heating warms the room; a towel rail dries towels. Many bathrooms have both, and a dual-fuel rail keeps working in summer when the boiler is off.
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.
