Underfloor heating in Caernarfon

Postcode districts: LL55
Nearby: Bangor, Holyhead and Llandudno
Guide price: £650–£2,300
Typical time on site: 1–2 working days (added to a fit)
Water: Soft across most of Gwynedd
Survey: Free, at your home

What does bathroom underfloor heating cost in Caernarfon?

Guide price in Caernarfon: £650–£2,300 including VAT, depending on the room and what you choose. Prices in Wales run at about 7% below 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.

Typical

Electric mat

£650–£1,400

Thermostat and RCD-protected supply

Electric, larger room

£1,100–£2,000

Whole floor coverage

Wet system

£1,400–£2,800

Manifold or single-zone kit

Guide prices for Caernarfon including VAT. Your itemised written quote after the free survey is the price that counts.

Working in Caernarfon

We cover every part of Caernarfon, including LL55, and nearby Bangor (8.3 miles) and Holyhead (18.8 miles).

Caernarfon gets the same process as anywhere else: a free survey at your home and a written, itemised quote. If your Caernarfon bathroom has a cold tiled floor and no room for a bigger radiator, an electric mat under new tiles is the simplest answer. Whether your Caernarfon bathroom is a small en-suite or a large main bathroom, the mat is sized to the open floor, not the whole room.

Water across much of Gwynedd is soft. Soft water is kind to grout, so mid-tone and darker grouts stay looking fresh. Hardness varies street by street, so check the figure for your postcode with your water supplier.

What the job includes

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
A dial, programmable or smart thermostat, with the supply RCD protected, tested and certified by a qualified electrician
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.

Electric or wet

Electric is cheaper to install and quick to lay in one room. Wet costs more upfront but is usually cheaper to run where it is fed by a gas boiler or heat pump.

Rules that apply in Wales

In Wales, the Welsh Part P also makes a new underfloor heating circuit notifiable, and it covers more bathroom electrical work than the English version. A registered electrician handles the notification.

More about underfloor heating

Underfloor heating in Caernarfon: questions

What is the price of bathroom underfloor heating in Caernarfon?

Bathroom underfloor heating in Caernarfon usually costs £650–£2,300 including VAT. Expect the lower end for a like-for-like job with standard products, and the upper end if things move or you choose premium finishes. Your quote is itemised and fixed in writing once agreed.

Is the water hard in Caernarfon?

Who handles building control for bathroom underfloor heating in Caernarfon?

Building control for Caernarfon is handled by the local council or an approved inspector. If your job needs sign-off — for example a new circuit, new drainage or a new extractor where there was none — we tell you at the survey and handle the notification as part of the work.

How long does bathroom underfloor heating take?

Allow 1–2 working days (added to a fit) on site for most jobs, plus the lead time for products after you approve the quote. We give you a day-by-day plan before work starts in Caernarfon.

Does underfloor heating raise the floor height?

Yes, a little. An electric mat on an insulation board usually adds roughly 10 mm before the adhesive and tile, which matters at the door threshold. Wet systems in low-profile boards add more, and screeded systems more again.