A new boiler in the UK typically costs £1,800–£4,500 fitted in 2026. A straightforward combi swap usually runs £2,000–£3,500, while system and regular (heat-only) boiler installations range from about £2,300–£4,500, depending on the model and how complex the job is.
Boiler Costs UK 2026 prices at a glance
| Boiler type | Typical cost (supplied & fitted) |
|---|---|
| Combi (budget) | £1,800–£2,500 |
| Combi (mid-range) | £2,500–£3,200 |
| Combi (premium) | £3,000–£4,000 |
| System boiler | £2,500–£4,000 |
| Regular / heat-only | £2,300–£3,800 |
| Back-boiler replacement | £3,000–£4,500 |
What affects the cost?
The biggest cost drivers are the boiler type and brand, and the complexity of the install. A like-for-like combi swap is cheapest. Converting from a regular to a combi system, moving the boiler, fitting new pipework, or a power flush (£300–£600) all add to the price. A smart thermostat typically adds £150–£250.
Grants and ways to save
There is no grant for a like-for-like gas boiler, the £7,500 Boiler Upgrade Scheme only covers heat pumps and biomass. However, low-income or benefit-claiming households may get help replacing a broken boiler through the ECO4 scheme. Many installers also offer finance to spread the cost.
Frequently asked questions
Is it cheaper to repair or replace a boiler?
For a boiler under 8 years old a repair is usually cheaper. Once a boiler is 10–15 years old, frequent repairs and falling efficiency often make replacement the better long-term value.
How much is boiler installation labour?
Labour for a standard swap is usually bundled into the quoted price. Where extra work is needed, relocation, new pipework or carpentry, expect £150–£400 on top.
Can I spread the cost of a new boiler?
Yes. Many installers and manufacturers offer interest-bearing or interest-free finance, letting you pay monthly rather than upfront.
Does a new boiler add value to my home?
A new, efficient boiler can make a home more attractive to buyers and improve its EPC rating, though it is rarely a major value-adder on its own.
How we work out these costs
Prices are compiled from published UK supplier price guides, manufacturer starting prices and public installation cost data, last reviewed June 2026. Figures are typical national ranges including standard installation unless stated; your own quote will vary by home, location and specification. Always compare at least three quotes.
Use our boiler cost calculator to estimate your price, or read our full boiler buying guide.