How much does a new boiler cost in the UK?

A like-for-like combi boiler swap, supplied and installed, typically costs £2,150–£4,000 across the UK. The one stated median in the research behind this page is £2,300, from a single installer's quotes, and it sits near the bottom of the band, not in its middle.

Typical UK price, like-for-like combi swap

Low

£2,150

Typical

£2,300

per installation

High

£4,000

Based on UK market research, updated September 2026. First-party London Heroes data will replace this as jobs complete.

These are market-research figures, not London Heroes job data. London Heroes publishes what its own completed jobs cost in the London Home Repair Index, job by job, as they complete.

The research behind this band states no VAT position for the band as a whole.

Prices and guidance last checked on 26 October 2026 against the committed UK price research this band is drawn from and the UK regulatory records behind our service pages.

What this price covers

One gas combi boiler replaced with a new gas combi boiler in the same place, in a single home, using the existing pipework and a standard flue, with the boiler supplied and fitted by the same installer and the old one taken away. Converting from a system, regular or back boiler, moving the boiler, a power flush, a new hot water cylinder, and new pipework or a bigger gas supply are different jobs, priced separately, and this band covers none of them.

The £2,300 typical figure is the median of 2,000 quotes one national online installer gave for this job in the first months of 2026. It is not the midpoint of the band. The low end and the median both come from that installer's quotes, and national online installers were the cheapest channel in the research, while the top of the band is the top of a comparison site's usual range for the same job. A local firm's quote can sit well above £2,300 and still be inside the band.

Why this is a UK price, not a London one

No source we found measures a London premium for this job. The London percentages in circulation come from sellers' own pages and lead-generation sites, state no sample or method, and disagree with each other. One national installer that publishes separate London and Manchester pages lists the same combi replacement price on both. And the plumbing and heating industry's collective agreement for England and Wales, published by JIB-PMES, sets one national basic hourly rate for each grade, with no London weighting.

The Office for National Statistics' Annual Survey of Hours and Earnings (ASHE) does show employed plumbers and heating installers in London on a higher median hourly wage than across the UK. But ASHE leaves out the self-employed, who do most of this work, ONS marks its London figure as one to use with caution, and it measures a wage, not the price of a job, so this guide does not turn it into a London price.

Getting a price you can compare

Ask for each part of the job priced on its own line: the boiler and its model, the flue, the controls, any filter or system flush, and making good. Two prices for a new boiler can describe different jobs, so compare what each one covers before you compare the totals.

Ask, too, whether a price includes VAT. The research behind this band states no VAT position for the band as a whole: the low end and the median come from quotes that may list VAT among what they include, while the range the top of the band comes from does not say.

On London Heroes, Heroes set their own prices, and you see the full price before you pay. Any change to it is a variation you approve in the app before it happens.

Common questions

Does the price include the boiler itself?

Yes. The band is for a boiler supplied and fitted by the same installer, with the old boiler taken away. A price for the boiler alone, or for fitting a boiler you have bought yourself, is a different number, so check which one a quote or an advert gives you.

Does the band cover moving the boiler or converting to a combi?

No. Moving the boiler, converting from a system, regular or back boiler, and adding a power flush, a new hot water cylinder or new pipework are each priced separately from a like-for-like swap, and this guide publishes no band for them. Ask for each one as its own line on a quote.

Can I get a new boiler for free?

Not through the government's Boiler Upgrade Scheme, which Ofgem runs in England and Wales: its grants are for heat pumps and biomass boilers, not gas boilers. As Ofgem listed them when we read its page on 26 October 2026, the scheme takes £7,500 off an air-to-water, ground source or water source heat pump, and to claim it the installer's business must be certified for that technology under the Microgeneration Certification Scheme (MCS). We have not researched any scheme that pays for a gas boiler, so if someone offers you a free one, ask which scheme pays for it and check with that scheme's own administrator before you agree to anything.

Not sure yet what needs doing? Boiler not working: causes and what to do goes through the likely causes and what you can check before you pay for a call-out.

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This guide is general information, not a quote or a substitute for advice from a qualified professional.