PRICE GUIDE · PLUMBING & HEATING · 2026–2027
Boiler Replacement cost in the UK
£1,500–£3,500 per install. Typically £2,100.
Replacing a boiler in the UK costs £1,500–£3,500, with £2,100 the average for a new boiler fully installed. Swapping a combi for a combi in the same place keeps it near the bottom; a larger boiler, a change of system or moving the boiler takes it towards the top.
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HOW MUCH IT COSTS
How much does a boiler replacement cost in the UK?
| Low end | £1,500 | a like-for-like combi swap |
|---|---|---|
| Typical | £2,100 | what most people pay |
| High end | £3,500 | a larger boiler or a change of system |
Locufy guide prices for 2026–2027. Updated 2026. A national range, not a quote — enter your town above for real prices from the plumbers and heating firms near you.
What moves the price
- Same type, same place — a like-for-like boiler replacement is quicker and cheaper than a system change
- Boiler output — bigger homes with two bathrooms need a more powerful, dearer boiler
- Flue and pipework — a new flue route or upgraded gas pipe adds time to the replacement
- Condition of the heating system — sludge may need a power flush before the new boiler goes in
- Warranty length — boilers with longer manufacturer warranties usually cost more
- Winter breakdowns — an urgent boiler replacement in a cold snap leaves less room to shop around
Plumbing and heating prices in the UK are up 6% over five years (ONS Consumer Price Inflation, Services for maintenance and repair, to 2026 August). Five years ago a typical boiler replacement would have cost about £2750 — an estimate from today's guide price and that index, not a recorded price. Source: ONS MM23 D7DO →
WHAT YOU GET
What a boiler replacement booking includes
Takes: One day for most like-for-like replacements, two days with extra pipework. Not included: New radiators, moving the boiler to another room and a full power flush on a badly sludged system are often extra — see the related guides below.
WHAT PEOPLE BOOK
Common boiler replacement jobs
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Boiler Replacement near you, with prices shown
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How to pay less
- Replace an ageing boiler in summer rather than waiting for a winter breakdown
- Keep the new boiler in the same position to avoid new flue and pipe runs
- Stay with the same type of boiler where it suits the home, as switching boiler type adds pipework to the replacement
Before you book
- A boiler replacement is a job for a Gas Safe registered engineer, who registers the new boiler with building control
- Compare the cost with a heat pump if you might qualify for the Boiler Upgrade Scheme
- Ask how long the manufacturer's warranty lasts and what servicing keeps it valid
- Check whether the quote includes disposal of the old boiler and any tanks
Boiler Replacement cost: questions people ask
£1,500–£3,500 per install, about £2,100 typical. A like-for-like combi swap costs least; a larger boiler or a change of system costs the most.
Most like-for-like replacements are finished in a day, so you are usually only without heating and hot water for that day.
When repairs become frequent, parts are hard to find or the boiler is very old and inefficient, replacement is often better value.
Yes. A Gas Safe engineer registers the installation with building control, and a compliance certificate follows by post.
New radiators, moving the boiler and a full power flush on a badly sludged system are often extra.
They are Locufy guide prices for the UK, read from published UK boiler replacement costs — a national range, not a quote. Boiler type and pipework decide your price.
MORE GUIDES