- Postcode districts
- PO1, PO2, PO3, PO4, PO5, PO6
- Nearby
- Gosport, South Hayling and Fareham
- Guide price
- £800–£2,800
- Typical time on site
- 1–2 working days (added to a fit)
- Water
- Hard across most of Hampshire
- Survey
- Free, at your home
What does bathroom underfloor heating cost in Portsmouth?
For Portsmouth, our guide range for bathroom underfloor heating is £800 to £2,800 including VAT. 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
- Thermostat and RCD-protected supply
Electric, larger room
- Whole floor coverage
Wet system
- Manifold or single-zone kit
Guide prices for Portsmouth including VAT. Your itemised written quote after the free survey is the price that counts.
Working in Portsmouth
As well as Portsmouth itself (PO1, PO2, PO3 and 3 more postcode districts), we survey in Gosport, South Hayling and Fareham.
Portsmouth is a big place with every kind of home, from terraces to flats to new builds, so we never price from a photo alone. If your Portsmouth home has a suspended timber floor, insulation boards under the mat stop heat disappearing into the void below. Whether your Portsmouth 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 Hampshire 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
- Insulation boards over the subfloor, so heat goes up into the tiles rather than down into the joists or screed
- 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.
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.
