How Much Does it Cost to Fit a New Radiator?

Fitting a new radiator is not the most difficult of tasks and any competent plumber with experience of central heating systems should be able to complete this project.

Key questions we’ll answer on this page are; how long it will take to fit the radiator? Can an existing boiler cope with an extra radiator? How many extra radiators can a typical boiler cope with? How much does it cost to fit a radiator?

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white radiator with columns

There are several reasons why you would want to add a radiator to your system.

Here are the most common:

  • To swap a single radiator for a double one.
  • To add an extra radiator to a room for better heating.
  • To move an existing radiator to a new location in the home.
  • To swap a standard radiator in the bathroom for a vertical heated towel rail.
  • As part of a loft, basement or another type of extension.

Before you go ahead with fitting an additional radiator, our friend and expert plumber and heating engineer Tony has some advice for you:

In the winter I often get phone calls from homeowners looking to replace a radiator with a larger one because their house is too cold. In many cases a quick temperature check of the existing radiators shows they are not working efficiently and this can usually be rectified by a powerflush of the system to remove any blockages. If your room is too cold, I would first suggest having your system checked by a professional who can then suggest a course of action. That could be a powerflush, an additional radiator or both.

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Your First Step: Select the Most Suitable Radiator by Calculating the Heat Output

Not all radiators are built the same. Even radiators of similar size can have vastly different heat outputs.

Fortunately, there is a system in place that allows you to easily calculate the amount of heat each room in your house requires to stay comfortably warm. You can then select the radiators needed to achieve this.

All you need to do is calculate the BTU (British Thermal Unit) your room needs.

Don’t worry, this isn’t a difficult or time-consuming process.

In fact; it’s incredibly easy.

Because all radiators are rated in BTUs, once you have this figure, you can choose the best radiators to suit your room size.

There are many factors that need to be taken into account when calculating the BTU for your room. The size of the room, how many external walls it has, how many square metres of glazing the room has etc.

To save time and to keep things simple, we suggest you use this very handy BTU calculator or alternatively this one to calculate the heating needs of your room and then select a radiator that matches or exceeds your requirements.

Radiator Costs

Hopefully, by now you will know the BTU requirements of your room and you can look online for radiators that match this figure.

With your radiator selected, it’s time to look at prices.

We will now explore the following:

  • Cost for a new radiator.
  • Cost of piping and making good the walls.
  • Extras you may want.
  • Labour charges.
  • Final price.

With all of the above costed, you can easily see the going rate for a plumber to install a new radiator.

We can even point you in the right direction so you can get a written quote.

Typical Price to Buy and Install a Radiator

The average cost of a radiator is detailed below.

These are all typical prices and assume an average sized room:

Living room radiator – £100(budget range) £300(premium range)

Bedroom radiator – £80(budget range) £300(premium range)

Bathroom heated towel rail – £80(budget range) £200(premium range)

The cost of piping is negligible but you’ll probably want to purchase a TRV (thermostatic radiator valve) so you can adjust the heat of the radiator.

Thermostatic valves cost around £15 for a good quality one.

Below is Our Radiator Installation Price Guide

Below you can find our guide price for the purchase and installation of a new radiator.

We’ll assume the radiator costs £100 and the room is upstairs on the first floor of a house with gas central heating.

Works Schedule:

  • Check the power output of the existing heating system and confirm that it can cope with an additional radiator.
  • Lift carpets or floorboards and located existing pipework.
  • Drain all the water from the system.
  • Extend the pipework to the desired location.
  • Secure the radiator bracket to wall and hang the radiator, connect it to the new pipework.
  • Install the TRV (thermostat valve)
  • Refill the heating system with water and fire up the heating to full power and test the heat output of each radiator in the house.
  • Re-lay carpets/flooring and make good any minor repairs to walls with plaster (to be painted/decorated by the customer).
  • Dispose of any waste material.
Project:Price:
Radiator£100.00
TRV (valve)£15.00
Pipe, connectors, parts etc£25.00
Labour + Profit Margin£75+(sole trader) £150 (Business)
VAT£43 - £73
Total:£260 - £440
Get a Custom Price HereGet a Custom Price Here

Do You Need to Pay VAT?

As you can see from the information displayed above, we’ve included VAT.

You can, of course, make a saving by choosing a smaller business or sole trader to fit your radiator for you.

There are many plumbers that are self-employed and charge enough to cover their wages, fuel and the few overheads they have.

Most smaller businesses like this are trading below the VAT registration threshold.

This means they don’t have to register for or charge their customers VAT.

We have more info about how you can avoid paying VAT (legally) on this page.

Should You Have The Heating System Powerflushed?

A clogged system is an inefficient system

Central heating systems often get clogged with scale from the water, rust from the metal pipes and radiators and general sludge.

This can result in cold spots on radiators which can only be compensated for by increasing the thermostat temperature and keeping the system switched on for longer.

This means it costs you more to heat each room, so a powerflush is a great idea if it hasn’t been done in the last ten years or so.

Most plumbers and central heating engineers recommend system powerflushing when:

  • A new boiler is fitted.
  • Any substantial work is carried out such as fitting new radiators, extensions etc.
  • Every 15 years.

If you’re thinking about installing new radiators because your house is too cold in the winter, then we suggest you first have the temperature of the radiators checked.

You might be able to resolve the problem with a powerflush rather than by installing new radiators.

See How Much Powerflushing Costs

How Many Additional Radiators Can be Added to an Existing System?

This will depend on your existing boiler and pump.

Most systems, even those that a many years old, can cope with upgrading the size of a radiator or two.

But if you are adding entirely new radiators to the system, perhaps due to a loft conversion or extension, then you really should calculate the requirements of your all your radiators and check if your boiler can cope with the extra load.

Most boilers in the UK are “range rated” down, this means they can cope with a higher load if needed.

If it can’t and you have exceeded the maximum number of radiators, then excess pressure will be put on the system.

This can result in an inefficient central heating system and premature failure of some parts, such as the pump.

Get a Quote

We hope you found our researched radiator price guide insightful.

To get a firm quote that is based on your specific requirements, just tap the button below and fill in the online form:

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More:

It should take no more than a few hours to pipe in a new radiator and test the system.
Yes. We have experience in the home improvement industry but only in the south of the United Kingdom. You can expect the price to be somewhat lower in locations further north in the country.

While wages depend on location and experience we do know how much plumbers and heating engineers charge per day, also known as the day rate.

Explore trade-person's day rates here

Job Prices is a web-based price checking service for the home improvement sector.

We explore the prices charged by tradespeople in the UK and display a suggested figure o our pages.

We also point our visitors in the right direction so they can get a fixed quote for themselves.

You can see all of our prices on this page.

We are not affiliated with either of these two companies but have used their services on several occasions and so far, the customer service has been very good and the products arrived quickly and as described.

Victoria Plum have a great range of bathroom radiators and heated towel rails.

Direct Heating Supplies offer a good range of stock with free delivery if you spend £50exVAT or more


This guide was written by and was last updated in May 2020.

Don’t forget; we have price guides for hundreds of home improvement projects.

Explore our full list of detailed price guides here.

Author - Danny Woodley