How Much Does A New Boiler Cost?

A new boiler will cost anywhere between £650 and £6,000.

Installing a new boiler will save you up to £350 per year on your energy bills.

Your old boiler could have an efficiency as low as 50%. This means that your boiler is stealing 50p for every £1 you spend on fuel!

You can compare prices of leading boiler installers in your area by completing the form above.


In this Guide:

New Boiler Cost

How Much does Installation Cost?

Finance Options for Boilers

Should you Opt for the Cheapest Boiler?

How Much can a New Boiler Save You?

Is it the Right Time for you to Get a New Boiler?



How Much does a New Boiler Cost?

new boiler cost

A boiler is an essential piece of machinery that every home needs. It is the heart of your property’s central heating system, supplying heat to your radiators and hot water to your taps and showers. 60% of your spend on annual energy bills is for heating, so having an efficient boiler installed can save you a lot of money!

The price of a new boiler can vary greatly from as little as £650 up to more than £6,000. The amount you will pay for a new boiler will depend on the type and size of the boiler you need. This will be determined by factors such as the kind of property you live in and the number of radiators/rooms you have.

The table below provides you with an approximate price range of boilers manufactured by the leading boiler brands in the UK. To find out more information about these brands, read our guide to the best boilers.

Boiler Brand
Typical Price Range
Grant
£1,110 - £3,900
Ideal
£640 - £2,460
Vaillant
£670 - £1,500
Viessmann
£855 - £6,190
Worcester Bosch
£730 - £2,620

Boilers are manufactured in a range of sizes to cater for the heating demands of different sized properties. Residential boilers typically come in sizes 24kW to 42kW. As a general rule, the larger your home is, the larger the boiler you will need.

For example, a small terraced house with one bathroom and up to 10 radiators will typically need a boiler between 24kW and 27kW. In comparison, a large detached house with two or more bathrooms and up to 20 radiators will need a boiler between 35kW and 42kW. Obviously the larger the boiler you need, the more you should expect to pay for it.

Size isn’t the only factor that can affect the cost of a new boiler - the type of boiler you require also plays a role. There are three main types of boiler installed into UK houses: combination (combi), conventional and system.

Combi boilers are the most popular type of boiler and tend to be the cheapest to purchase and install. You can find out more about the cost of the different types of boilers by reading below.



Combi Boiler Cost

A combi boiler heats both your water and radiators directly from the boiler itself. This means that there is no need for a water tank and pipework to be installed into your home. This is great if you live in a small property or one with limited roof space.

Best for:

• Small properties with little to no storage and loft space

• Homes with one bathroom

The table below shows you the typical price range of combi boilers based on their size, produced by the best boiler brands in the UK:

Boiler Brand
Size Range
Typical Price Range
Grant
21kW - 36kW
£880 - £3,200
Ideal
24kW - 40kW
£640 - £1,310
Vaillant
24kW - 28kW
£860 - £1,480
Viessmann
26kW - 35kW
£915 - £1,375
Worcester Bosch
12kW - 42kW
£880 - £2,620



Conventional Boiler Cost

A conventional boiler, also known as a regular boiler, requires both a hot water cistern and a cold water tank to feed hot water to your radiators and taps. These will need to be installed into your loft and the upper levels of your house.

Best for:

• Large properties with plenty of storage and loft space

• Homes with two or more bathrooms

The table below shows you the typical price range of conventional boilers based on their size, produced by the best boiler brands in the UK:

Boiler Brand
Size Range
Typical Price Range
Grant
15kW - 70kW
£1,110 - £3,900
Ideal
12kW - 36kW
£650 - £2,460
Vaillant
12kW - 38kW
£670 - £1,395
Viessmann
13kW - 35kW
£855 - £1,360
Worcester Bosch
12kW - 70kW
£730 - £2,175



System Boiler Cost

A system boiler heats your radiators directly, but the hot water from the boiler must be pumped through a hot water cylinder to feed hot water to your taps and showers. This will need to be stored in your loft or the upper levels of your house.

Best for:

• Large properties with little to no loft space

• Homes with two or more bathrooms

The table below shows you the typical price range of system boilers based on their size, produced by the best boiler brands in the UK:

Boiler Brand
Size Range
Typical Price Range
Grant
15kW - 46kW
£1,340 - £2,070
Ideal
15kW - 32kW
£725 - £1,210
Vaillant
12kW - 37kW
£785 - £1,285
Viessmann
19kW - 35kW
£895 - £4,340
Worcester Bosch
9kW - 35kW
£780 - £2,410

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Could You Save With A New Boiler?

Select How Many Live In Your House To Find Out!

Boiler House

How Much does Boiler Installation Cost?

Installing a new boiler can sometimes cost as much as the boiler itself. Installation costs typically range from £500 to £1,500 depending on the type of boiler you have installed, how much technical work is needed to fit it and the parts needed and their availability.

Conventional and system boilers often cost a lot more to install than combi boilers due to the pipework and water tanks involved in fitting them. Total installation time for these boilers can be up to three days.

Only a trained professional should install your new boiler. If you are having a gas or LPG run boiler, the fitter must be a Gas Safe Registered engineer. For oil run boilers, you should use an OFTEC registered installer. For a list for registered installers, visit the Gas Safe Register or OFTEC.

The table below provides you an example of the estimated installation costs of a new combi, conventional and system boiler:

Boiler Type
Boiler Cost
Installation Cost
Total Cost
Combi
£800
£550
£1,350
Conventional
£950
£1,200
£2,150
System
£1,050
£1,100
£2,150

When choosing what company to install your new boiler, bear in mind that energy providers have been found to charge up to a third more for the same job than independent installers.

Additional costs to be aware of when budgeting for your installation include:

• Changing from one type of boiler to another

• Moving the location of the boiler

• Removing old or damaged parts, such as pipes

Powerflushing your central heating system

It is unlikely that you will need all these additional extras. Some may already be included in your installation quote, while others might not be necessary for your installation.

Here Francis, a Gas Safe Registered Engineer, discusses what factors can affect the overall cost of your boiler installation:

 

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Boilers on Finance

Buying a new energy efficient boiler is not cheap. Because of this, many boiler installation companies offer you the option of paying for your boiler on finance. Alternatively, you can take out a loan from a bank or a third party lending company.

Buying a new boiler on finance allows you to spread the cost, making it a more affordable investment.

You will be required to pay a lump sum of money every month over a number of years at a fixed interest rate. Most finance options will not require you to pay any upfront costs, although if you do the monthly amount you repay will often be smaller.

Most companies offer a wide range of finance options, meaning that you should be able to find one that suits your exact needs.

Below is an example finance package for a new boiler that costs £2,122 including installation costs:

Cost of Boiler and Installation
Loan Repayment Period
Interest Rate
Monthly Repayment Amount
Total Amount of Interest Charged
Total Repayment Amount
£2,122
60 months
11.3%
£46.46
£665.60
£2,787.60

Please note that when applying for financial support for your new boiler, you will need to provide the company with some personal information such as a form of identification, your home address and your employment status.

Read our guide to boiler finance


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Should you Opt for the Cheapest Boiler?

cheap boiler

All the boiler brands mentioned on this page are of a high quality. There are cheaper boilers available, especially online and without installation. However, ensuring that the boiler is safe and safely installed is of paramount importance.

Boilers are an investment to the future energy efficiency of your home. A badly manufactured or installed boiler could end up costing you a lot more in the future. Boilers can also be very dangerous if mis-handled so it is important that they are fitted by a Gas Safe registered installer or an OFTEC installer.

If you are on a budget, one way to safely save money on your boiler is by visiting a smaller, local installation company. Smaller companies often do not have to pay as much tax and can therefore offer better deals to their customers.

Fill in the form at the top of the page to receive quotes from both national and local installers, and start comparing prices today.

If you are worried about the upfront costs of installing a new boiler you can visit our free boiler grants page here. You can also read our guide to cheap boilers.

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How Much will you Save? What will be your Return on Investment?

Installing a new boiler can save a detached house up to £570 a year while a semi-detached home will save around £350 per year.

If you exchange your old boiler for a new more energy efficient boiler you will almost certainly see a saving on your energy bills straight away.

Type of Property
Typical cost of boiler and installation
Energy bill savings
Time to return on investment
Return on investment after 10 years
Detached house
£3,020
£570
5.2 years
£2,680
Semi detached house
£2,632
£350
7.7 years
£768
Detached bungalow
£2,320
£290
8.0 years
£580
Mid terrace house
£2,320
£280
8.3 years
£480
Mid floor flat
£2,112
£145
14.6 years
-£967

*These figures are based on replacing a G-rated condensing boiler with a new A-rated condensing boiler. Energy bill savings taken from Energy Saving Trust.

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Is Now the Right Time for you to Get a New Boiler?

If you are unsure if you need a new boiler, ask yourself these questions:


Q. Is your boiler beyond the point of cost-efficient repair?

A. If you've had a qualified engineer take a look at your boiler and they’ve told you as much, then you know the time is ripe for a replacement.


Q. Is your boiler giving you control over your heating?

A. It will help you cut your heating bills if you have a flexible timer or controls, as well as a thermostat. So if you don’t have these, it’s worth considering (but you may only need new controls installing).


Q. Is your boiler on the floor?

A. It’s probably older and less energy-efficient than new boilers, making a replacement a worthy job.


Q. Does your boiler have a continuous pilot light?

A. Again, this wastes a lot of gas, so consider a change.


Q. Does your system have a dry cycle?

A. This is found on older boilers, which don’t switch off when an optimum house temperature is reached, but rather send the heat to an ‘overflow radiator’. This can waste a lot of energy, so can be a big incentive for a replacement boiler.


Q. Is your boiler G-rated?

A. Once again, for energy efficiency, consider a replacement.


Q. Want to sell your house?

A. Getting a new boiler can add value to your property.

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What Next?

Always get a qualified engineer to assess your boiler if you are having issues with it. The engineer will be able to tell you if the boiler can be repaired or if it needs replacing completely. Most boilers over 15 years old will need replacing soon.

Once you have your new boiler installed, we strongly recommend ensuring you have an annual boiler service to keep your boiler running smoothly.

You can compare boiler and installation prices from local installers by completing the form at the top of this page.


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