- Postcode districts
- DA3, DA4, DA13
- Nearby
- Hartley, Swanscombe and Gravesend
- Guide price
- £800–£2,800
- Typical time on site
- 1–2 working days (added to a fit)
- Water
- Very hard across most of Kent
- Survey
- Free, at your home
What does bathroom underfloor heating cost in Longfield?
As a guide, budget £800 to £2,800 including VAT for bathroom underfloor heating in Longfield; your written quote will pin it down. Labour costs in South East England put local prices at about 12% above the UK guide figure. 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 Longfield including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Longfield
We cover every part of Longfield, including DA3, DA4 and DA13, and nearby Hartley (0.7 miles) and Swanscombe (3.5 miles).
Being a smaller town does not change how we work in Longfield: free survey, written quote, one team. For Longfield homes having the bathroom floor replaced, underfloor heating adds one to two days to the fit. If your Longfield bathroom has a cold tiled floor and no room for a bigger radiator, an electric mat under new tiles is the simplest answer.
Supplies across most of Kent are very 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
- Insulation boards over the subfloor, so heat goes up into the tiles rather than down into the joists or screed
- A dial, programmable or smart thermostat, with the supply RCD protected, tested and certified by a qualified electrician
- 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
Decisions to make first
Floor finish
Tiles and stone pass heat through well. LVT and vinyl can work, but check the maximum floor temperature the flooring maker allows.
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.

