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How will underfloor heating affect your energy bills?

Some 39% of underfloor-heating owners believe it cost them more on energy, but 40% say their energy bills stayed the same

Cat on floor with underfloor heating

Just 20% of the underfloor heating owners we asked said that it had decreased their heating bills. So if you’re planning on getting underfloor heating to save you money on your energy bills, you might want to think again.

Those with electric underfloor heating, as opposed to water underfloor heating, were more likely to say it had increased their bills a little* – 41% of electric owners, as opposed to 14% of water owners. Conversely, 28% of people with a water system think it decreased their bills a little, while just 6% with electric did.

These figures are not to say that you shouldn’t get underfloor heating. It can turn a cold bathroom or modern kitchen with a tiled floor into a warm, luxurious room. But saving money shouldn’t be your sole driver.

Keep reading to find out how much underfloor heating costs and whether electric or water underfloor heating is right for your home.

Find out more about the pros and cons of underfloor heating by reading our in-depth guide. It includes tips from underfloor-heating owners and experts to help you avoid costly mistakes.


Water vs electric underfloor heating

Both types of underfloor heating have different benefits and potential drawbacks.

Electric underfloor heating is generally a lot cheaper to buy than water – you can get systems for around £50 to £100 per square metre.

You can also fit it yourself if you’re a confident DIYer, although you will need a professional to connect the electrics.

Child on floor with underfloor heating

As water underfloor heating is more complicated to lay – it involves carefully laying pipes in a looped pattern across the floor and covering with screed – it’s usually better left to a professional.

It’s also generally cheaper to run than electric, so often used for larger spaces.

We asked people which rooms their underfloor heating is installed in, it varied depending on the type:

Rooms underfloor heating is installed in

Overall, more people had electric underfloor heating: 65% of the owners we asked have an electric system, while 35% have a water system.

Underfloor heating costs

The highest percentage of people (nearly a quarter) we asked spent between £200 and £500 on buying and installing their underfloor heating. Those with electric heating were most likely to spend this amount, while those with water systems spent into the thousands.

This is just a small snapshot of people, and there are a lot of factors that can affect the price. We recommend you get at least three professionals to come an advise you and give a quote before you buy.

You can use Which? Trusted Traders to help you find a local installer you can trust.

Water underfloor heating shown before the floor is laid over the top.

What affects the cost of underfloor heating?

So you’re prepared for what the cost might be, here are some of the reasons why the price can go up.

  • How many rooms and the size of the room(s) you’re installing it in.
  • Zoning your heating – if you’re installing it in more than one room, you can differ the temperature in each room – will add to the cost.
  • How many energy-saving elements the room(s) your installing it in has – this may affect the wattage you need.
  • Whether you’re retrofitting underfloor heating to a room where the floor is already laid.
  • What your floor structure is like and how well it will conduct heat.

For full details on what could increase the price of underfloor heating, as well as what the installation process is and the key things you should consider, visit underfloor heating costs and installation.

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