Cost of New Boilers: What's the Price Tag for a New Boiler in June 2025?
GreenMatch
Boilers
The Average Cost of a New Boiler (as of 2023)
Last Updated: June 10, 2025Written by Alex Johnson
New boiler costs in the UK for a 3-4 bedroom home can range from £700 to £2,900 for the boiler unit, and an additional £1,000 to £2,000 for installation. The average cost for a new combi boiler for a house of this size is roughly £1,800.
Before you dive in, it's essential to understand that boiler prices depend on several factors, such as its type, brand, fuel source, and the installation complexity. Keep reading to learn about each type of boiler and what it might cost you.
Combi Boiler Cost
Combi boilers are the most popular choice in the UK, with around 80% of households using one. Combi boilers cost between £600 to £4,000 for the unit, and installation can cost between £1,600 and £6,000, depending on the brand and fuel type you choose.
Most combi boilers are suitable for homes with up to 2 bathrooms, as they can't produce high quantities of hot water for multiple outlets simultaneously. High-power combi boilers, with outputs above 28kW, can handle a larger output but may cost more.
System Boiler Cost
System boilers work alongside a hot water cylinder, keeping a constant supply of hot water in store. This makes them suitable for medium-to-large homes, with more than 2 bathrooms, as they can serve multiple outlets at once. Gas system boilers typically cost between £600 to £2,000 for the unit, and installation costs can range from £1,000 to £2,500. Oil system boilers might be more expensive, costing up to £3,000 for the unit and installation costs of around £2,000.
Conventional Boiler Cost
Conventional boilers require a hot water cylinder and a cold water feed tank (usually in the loft), making them the most complex and expensive of the three. The cost for a new conventional boiler starts at around £600 for the unit, and the average cost for full installation is approximately £3,550.
It's important to note that installing a new conventional boiler is only recommended if you already have one. Installing a conventional boiler for the first time can be costly and invasive, as it requires extensive pipework and additional tanks.
Gas Boiler Cost
Gas boilers, powered by natural gas from the National Grid, are one of the most popular choices in the UK due to their ease of use and lower costs compared to other fuel options. While the units themselves can cost between £600 to £3,300, installation fees can add substantial costs, totaling up to £2,000 for complex installations.
Oil Boiler Cost
Oil boilers are a popular choice for homes not connected to the national gas grid. Oil boilers cost between approximately £1,300 to £4,000 for the unit and installation charges of around £2,000. It's worth noting that you'll need a storage tank for the oil, which can cost an additional £500 to £1,000.
Electric Boiler Cost
Electric boilers are a viable alternative for homes off the gas grid. Electric boilers cost between £700 to £2,000, making them close in price to combi boilers. However, running an electric boiler can be expensive due to the high cost of electricity compared to gas.
If you have solar panels, running an electric boiler can potentially be cost-effective, as you can use your panels to power your boiler. It's essential to consider the costs of running an electric boiler, as electricity is approximately 4 times more expensive than gas.
When choosing a new boiler, remember that boiler prices depend on several factors, including its type, brand, power output, installation complexity, and fuel source. To get an accurate quote tailored to your specific needs, contact a qualified installer.
If you're looking for quotes from local, qualified installers, we can help! Simply fill in our 30-second form, and we'll connect you with up to 3 installers who will provide you with competitive quotes to choose from. It's quick, easy, and free - what are you waiting for?
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References:
[1] GreenMatch. (n.d.). New Gas Boiler Comparison & Prices [Online]. Available: https://greenmatch.co.uk/gas-boilers
[2] Which? Boilers (2022, March). Boiler costs: Gas, oil and LPG boilers. [Online]. Available: https://www.which.co.uk/reviews/boilers/article/boiler-costs-average-prices-for-boilers-in-the-uk-2022
[3] The Guardian. (2021, August). How to find the best and cheapest boiler. [Online]. Available: https://www.theguardian.com/money/2021/aug/08/how-to-find-the-best-and-cheapest-boiler
[4] Compare My Move. (2021, August). How Much Does a New Boiler Cost? [Online]. Available: https://www.comparemymove.com/cost-guides/how-much-does-a-new-boiler-cost/
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