Underfloor heating in Isleworth

Postcode districts: TW3, TW5, TW7
Nearby: Hounslow, Heston and Southall
Guide price: £900–£3,100
Typical time on site: 1–2 working days (added to a fit)
Water: Very hard across most of Greater London
Survey: Free, at your home

What does bathroom underfloor heating cost in Isleworth?

Our guide price for bathroom underfloor heating in Isleworth is £900–£3,100 including VAT. Prices in London run at about 25% 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.

Typical

Electric mat

£900–£1,900

Thermostat and RCD-protected supply

Electric, larger room

£1,500–£2,800

Whole floor coverage

Wet system

£1,900–£3,800

Manifold or single-zone kit

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

Working in Isleworth

We cover every part of Isleworth, including TW3, TW5 and TW7, and nearby Hounslow (0.9 miles) and Heston (1.5 miles).

London homes in Isleworth often mean stairs, permits and neighbours below; we plan the logistics as carefully as the bathroom. Where a Isleworth home already has a heat pump, or the heating is being altered, a wet underfloor system is worth comparing with electric. Whether your Isleworth 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 Greater London is 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

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
The electric mat or cable laid to the open floor, kept clear of where the WC, bath and fixed furniture will sit
A floor sensor set between the heating runs and wired back to the thermostat

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.

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.

More about underfloor heating

Underfloor heating in Isleworth: questions

What is the price of bathroom underfloor heating in Isleworth?

Bathroom underfloor heating in Isleworth usually costs £900–£3,100 including VAT. Room size, layout changes and your choice of products move the figure within that range. The free survey gives you an itemised quote, fixed in writing once the details are agreed.

Who handles building control for bathroom underfloor heating in Isleworth?

Building control for Isleworth 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 Isleworth.

Is the home survey in Isleworth really free?

Yes. We visit, measure the room, check the pipework, drainage and electrics, and talk through what you want. You then get a written, itemised quote with no obligation to go ahead.

Is underfloor heating enough to heat a bathroom on its own?

In a well-insulated bathroom with most of the floor open, it often is. In a small room, the bath, WC and furniture cover much of the floor, so the heated area may be too small to be the only heat source. A heated towel rail alongside is the usual answer.