New boiler cost in the UK (2026 guide)
Most price guides put a like-for-like combi boiler swap, fully fitted, at about £1,800 to £3,500 in 2026. London and the South East usually cost more, and moving the boiler or changing the type of system adds to the bill.
The guides disagree, so use the range as a benchmark, because every home differs. Get written quotes from Gas Safe registered engineers for your own home.
New boiler cost at a glance
| Job | Typical range | Source note |
|---|---|---|
| Like-for-like combi, fitted | £1,800 to £3,500 | MyJobQuote, Fantastic Services, Heatable |
| Same job in London and the South East | About £2,000 to £3,600 | Fantastic Services |
| Move the boiler within the same room | About £400 to £800 | Ethy |
| Move it to another floor or the loft | About £800 to £1,200 or more | Ethy |
| Change from regular to combi | About £3,500 to £5,500 | Heatable, one guide |
| Boiler repair, common faults | £150 to £400 | Fantastic Services, Housekeep |
What a quote should include
A fitted price should cover the boiler, the labour, standard pipework and a flue. Check that it also covers a new thermostat or controls, a carbon monoxide alarm, removal of the old boiler and the warranty. Extras such as a magnetic filter or a smart thermostat may cost more, so ask.
Be careful with listed prices that show the boiler only, because they leave out fitting. Fitting is a large part of the total.
What changes the price
Several things move the price of a boiler job, although the type matters most.
- Type. A combi is the usual choice for small homes. Larger homes with several bathrooms may need a system boiler and a cylinder.
- Output and make. A bigger or better-known boiler costs more.
- Position. Moving the boiler needs extra pipework and a new flue.
- Condition of the system. Old pipes may need cleaning or flushing.
- Location. London and the South East are dearer, by roughly 10% to 20% in one guide.
Repair or replace?
A repair of £150 to £400 is often worth it for a boiler that is otherwise sound. However, when the boiler is old and the repair is large, a new one may cost less over time. Our guide on when to replace a boiler lists the signs. If yours has failed today, see emergency boiler repair.
Grants and ways to save
Grants rarely cover a like-for-like gas boiler. The Boiler Upgrade Scheme supports heat pumps instead, as our boiler grants guide explains. You can still save in other ways. Compare at least three quotes, ask about fixed-price packages and book outside the coldest weeks.
How to get quotes
Only a Gas Safe registered engineer may fit a gas boiler, since it is the law. Ask to see the ID card and check the number on the register. Ask for a written, itemised quote and the warranty terms. To compare, send us your job and we will pass it to local plumbers and heating engineers. We do not vet them, so the checks are yours to make. See plumbers near you.
Where these figures come from
We checked price guides from MyJobQuote, Fantastic Services, Heatable, Ethy, Housekeep and Checkatrade in October 2026. A government benchmark puts replacement gas boilers at roughly £1,600 to £4,000, which fits the wider spread. Most guides are commercial, so treat them as a guide.
Frequently asked questions
How much does a new boiler cost to install in 2026?
About £1,800 to £3,500 for a like-for-like combi, fully fitted, in most guides. London and bigger jobs cost more.
How much does it cost to fix a boiler?
Fantastic Services and Housekeep suggest about £150 to £400 for common faults. Checkatrade gives a wider range, from about £120 to £750.
Is a new boiler cheaper to run?
Often, because modern condensing boilers are more efficient than old ones. The saving depends on your home and how you use heating, so ask the engineer for an estimate.
Can I get a grant for a new gas boiler?
Rarely, since the main schemes fund heat pumps. See our guide to boiler grants for what each scheme does fund.
Does the quote include VAT?
Check, because some prices include VAT and some do not. Ask for the final total.