New Boiler Cost

A new boiler costs anywhere between £650 and £6,000 in 2018.

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 get a free boiler quote from a trusted installer in your area by completing the form above.

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!

What's in this guide to new boiler costs?

Head straight to a specific section by clicking the links below.

How Much Does a New Boiler Cost?

new boiler cost

The price of a new boiler can vary greatly from as little as £650 up to more than £6,000. The amount you'll 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
£1,110 - £3,900
£640 - £2,460
£670 - £1,500
£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. Oil boilers and biomass boilers are also available.

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 Prices – How Much Does a Combi Boiler Cost in 2018?

Combi or combination boilers are the most common type of boiler in UK homes – and it’s no wonder why. They heat both your water and radiators directly from the boiler itself, meaning there’s no need for a water tank or lots of pipework to be fitted into your home; this reduces the cost of installing a combi boiler.

Compared to other boilers, you’ll also find that this type of system is generally more cost-effective overall. Combi boiler deals start from £640 and thanks to better efficiency, 90% of the energy it uses is converted into heating your radiators and water.

Best for:

• Small properties with little to no storage and loft space

• Homes with one bathroom

• Reducing heating costs

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

Boiler Brand
Size Range
Typical Price Range
Overall Warranty
21kW - 36kW
£880 - £3,200
2 years
24kW - 40kW
£640 - £1,310
2-10 years
24kW - 28kW
£860 - £1,480
2-7 years
26kW - 35kW
£915 - £1,375
3-5 years
Worcester Bosch
12kW - 42kW
£880 - £2,620
2-5 years

See our combi boiler prices page for more detailed information on costs.

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
Overall Warranty
15kW - 70kW
£1,110 - £3,900
2 years
12kW - 36kW
£650 - £2,460
2 years
12kW - 38kW
£670 - £1,395
5 years
13kW - 35kW
£855 - £1,360
5 years
Worcester Bosch
12kW - 70kW
£730 - £2,175
2-5 years

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
Overall Warranty
15kW - 46kW
£1,340 - £2,070
2 years
15kW - 32kW
£725 - £1,210
2-10 years
12kW - 37kW
£785 - £1,285
7 years
19kW - 35kW
£895 - £4,340
5 years
Worcester Bosch
9kW - 35kW
£780 - £2,410
2-5 years

Oil Boiler Cost

Like the name suggests, oil boilers are fired by oil. Oil boiler prices depend on whether you opt for a combi, conventional or system boiler.

Best for:

• Those not connected to a gas supply

• Anyone looking for an alternative to electric or gas

There are fewer manufacturers that produce oil boilers, namely Firebird, Grant, Mistral, Warmflow and Worcester Bosch. Based on our research, you can expect to pay between £1,000 and £5,000 for the system itself. The table below shows you the typical price range of oil boilers based on their size and boiler type:

Boiler Brand
Size Range
Typical Price Range
Overall Warranty
Combi, Conventional, System
20kW - 73kW
£1,250 - £2,820
5 years
Combi, Conventional, System
15kW - 70kW
£1,110 - £3,890
2 years
Combi, System
20kW - 70kW
£1,700 - £4,600
2-5 years
Combi, System
21kW - 33kW
£1,350 - £2,000
2-5 years
Worcester Bosch
Combi, Conventional, System
12kW - 70kW
£1,255 - £2,610
2 years

Biomass Boiler Cost

Biomass boilers provide heating that's fired by wood. The cost of a biomass boiler will be down to the type you choose, from plane grate and moving grate to batch-fired and stoker.

Best for:

• Those not connected to an electric or gas supply

• People not connected to a mains supply and looking for an alternative to oil boilers

There are a couple of well-respected biomass boiler manufacturers - ETA and Herz - that are located in Germany. Based on our research, you can expect to pay anything between £8,000 and £15,000 for the biomass boiler plus full installation. Biomass boilers typically come with a warranty of between 2 and 5 years.

If you'd like to get an accurate boiler quote based on your individual circumstances, please answer the question below.

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How Much Would a New Boiler Cost You?

Boiler Installation Cost

Installing a new boiler can sometimes cost as much as the boiler itself. Boiler installation costs typically range from £500 to £1,500 depending on the type 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 an LPG-run or gas 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 different types of boiler:

Boiler Type
Boiler Cost
Installation Cost
Total Cost
Time Taken
1 day
1 day
2-3 days
2-3 days
3+ days

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, radiators and TRVs (thermostatic radiator valves)

• Powerflushing your central heating system

It is unlikely that you will need all these additional extras. Some may already be included in your boiler 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, boiler installation companies or heating engineers may 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 are some example finance packages for a new boiler including installation costs:

Cost of Boiler and Installation
Loan Repayment Period
Interest Rate
Monthly Repayment Amount
Total Amount of Interest Charged
Total Repayment Amount
60 months
60 months

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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Get a Bespoke Boiler Quote for Your Home

Cheap Boilers: Are They Worth It?

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.

You might find that cheaper boilers may not meet the strict energy efficiency guidelines set by the government. A way to check this is using ErP Directive (Energy related Products Directive) guidelines, formerly known as SEDBUK. If you're looking for a new boiler, our suppliers can walk you through the different ratings, what they mean and quote you on different types and brands; all you need to do is complete the form at the top of this page and someone will be in contact.

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
5.2 years
Semi detached house
7.7 years
Detached bungalow
8.0 years
Mid terrace house
8.3 years
Mid floor flat
14.6 years

*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.

Could You Save With A New Boiler?

Select How Many Live In Your House To Find Out!

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Boiler Service Cost

Your boiler should be serviced once a year by a registered Gas Safe Engineer. This will make sure that it continues to run smoothly and safely. A service should include the cleaning and testing of your boiler, as well as the identification of any faults. A proper boiler service should take about 30 minutes to complete.

According to Which? the average boiler service cost is around £72, but it can cost anywhere from £30 up to £120. The exact amount you’ll be charged will depend on a number of factors including who carries out the service and whether any faults are found.

How Much Do Boiler Repairs Cost?

Never attempt to fix your boiler yourself. Always use an accredited boiler engineer to do the job. As a guide, you should expect to pay between £100 and £400 for most repairs – this includes parts and labour costs. It’s impossible to give an exact figure for the cost of repairs because prices are affected by a range of variables including the type and age of your boiler, and the cause of the fault.

The table below gives you an idea of how much the most common boiler repairs cost:

Approximate Cost
Air vent
Printed circuit board
Heat exchanger

Always check your boiler warranty as you might find that it covers your boiler’s servicing and repairs, meaning you won’t have to pay a penny. All boilers come with at least a 1-year standard warranty, but you can extend your boiler warranty for up to 10 years.

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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 system and they’ve told you as much, then you know the time is right for a boiler replacement. Check out our page on how often a boiler should be replaced to do your own initial assessment.

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 get a boiler installation quote from a trusted local installer by completing the form at the top of this page.

You might also be interested in:

Can you get a free boiler?

How Much Would a New Boiler Cost You?

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