Quick answer
Electric underfloor heating for a typical Plymouth bathroom costs roughly £400–£900 supplied and fitted. That covers the heating mat, a thermostat and the electrician’s connection. A wet (water-fed) system costs more — usually £1,000–£2,000-plus — and only really pays off on bigger rooms or a wider renovation.
What underfloor heating actually costs in Plymouth
Warm tiles underfoot on a cold morning is one of those small luxuries people never regret — and in a bathroom it’s more affordable than most assume. For a typical room of two to five square metres, an electric mat system is the obvious choice, and the price is modest set against the rest of a refit. Because Plymouth sits around 9% below the UK average for bathroom work, you’ll usually find our pricing a touch friendlier than the national figures you’ll have read elsewhere.
The breakdown below covers the two systems we fit, so you can see where the money goes before you decide.
Electric mat system
~£400–£900 supplied and fitted. A thin heating mat is rolled out under the tile adhesive, wired to a thermostat and connected by an electrician. The mat itself is usually £100–£300 for a bathroom-sized floor, with fitting and the electrical connection on top. Quick to install, low disruption, and ideal for the small-to-medium floors most Plymouth bathrooms have.
Wet (water-fed) system
~£1,000–£2,000-plus. Pipes carrying warm water from your heating run beneath the floor. It’s cheaper to run over a large area and pairs well with a wider renovation, but the pipework, manifold and extra floor build-up rarely justify the cost in a compact bathroom. We’ll tell you honestly when it does and doesn’t make sense.
What drives the cost
Two bathrooms the same size can land at different prices. These are the things that move the figure, and we’ll set them out plainly in your quote rather than let them creep up later.
What pushes it up
- A larger floor area — more matting and more tiles over it
- A wet system, with its manifold, pipework and deeper build-up
- A smart or programmable thermostat over a basic dial
- Retrofitting into an existing floor rather than a full refit
What keeps it sensible
- Fitting it during a refit, while the floor is already up
- A compact, regular-shaped floor with few awkward cuts
- An electric mat rather than a full wet installation
- Combining it with the tiling and flooring already booked in
The heating goes in under the tiles, so it’s far cheaper and cleaner to fit while the floor is open during a full refit.
The electrician’s connection
Whichever system you choose, the heating has to be wired in and connected safely — and that’s not a job for a general handyman. Electrical work in a bathroom is notifiable under Part P of the Building Regulations, so the final connection and thermostat wiring must be done by a qualified electrician. We coordinate that for you as part of the install, the same way we do across a full bathroom installation, so there’s no separate trade for you to chase and the certification is handled properly.
Why it’s best fitted during a full refit
Underfloor heating lives beneath your tiles, which is exactly why timing matters. Fitting it during a bathroom renovation, while the old floor is already lifted, means the mat or pipework goes straight onto a fresh insulation board with no extra disruption. Add it as a retrofit later and you’re taking up a perfectly good tiled floor first — paying to undo work you’ve already paid for. If underfloor heating is even a maybe, mention it early and we’ll build it into the plan from the start. You can see how it fits the wider budget on our Plymouth bathroom cost guide.
What about running costs?
This is where people are pleasantly surprised. Bathroom underfloor heating is only on when you want it — a quick warm-up before your morning shower, then off again — rather than heating the room all day. Set on a timer through the thermostat, it sips electricity in short, controlled bursts, so the running cost on a small bathroom floor is genuinely low.
An insulation board under the mat makes a real difference too: it pushes the heat up into the tiles instead of losing it down into the subfloor, so the floor warms faster and stays warm on less power. It’s a small extra that quietly pays for itself. If you’re weighing up warmth elsewhere in the room, see how much a heated towel rail costs alongside it.
Common questions
Is underfloor heating expensive to run?
No — in a bathroom it’s one of the cheaper ways to take the chill off. It only runs when you want it, usually on a timer for a short warm-up rather than all day, so it uses electricity in brief bursts. An insulation board beneath the mat keeps that running cost lower still by sending the heat upward into the tiles.
Electric or wet underfloor heating for a bathroom?
For most Plymouth bathrooms, electric. An electric mat is cheaper to fit, slimmer underfoot and ideal for the small-to-medium floors bathrooms tend to have. A wet system only earns its keep over larger areas or as part of a wider whole-home heating project, so it’s rarely the right call for a single compact bathroom.
Can I add underfloor heating without retiling?
Technically yes, but it’s rarely worth it. The heating sits under the tiles, so retrofitting means lifting your existing floor first — paying to remove work that’s perfectly good. It’s far better value fitted during a refit while the floor is already up, which is why we always ask about it before tiling begins.
Warm tiles, fair price
Get a fixed quote for underfloor heating
Tell us about your bathroom and we’ll price the heating as part of a clear, written quote — with the electrician’s connection and certification built in.