New boiler cost in 2026
Most households replace a boiler about once a decade, which is long enough for the price to have moved on completely. Here is what installers are charging in 2026, broken down by the job rather than by the badge on the front, because the work around the boiler is what separates an £1,800 quote from a £4,000 one.
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Boilers prices in 2026
| Job | Typical cost | What that covers |
|---|---|---|
| Boiler repair or service | From £80 | Servicing runs £80 to £120; repairs depend on the fault, from a quick fix to major parts. |
| Like-for-like boiler swap | £1,800 to £2,600 | Same type, same position, existing pipework reused. The boiler itself is £600 to £1,400 of that. |
| New or conversion boiler install | £2,400 to £4,500 | Relocations, conversions to a different system and back boiler removals, priced by the work around the boiler. |
Ranges, not quotes. Every job is priced on the property, so treat these as the bracket your quotes should land in rather than a figure to hold an installer to.
What shapes your quote
The job, not the boiler
Labour and materials are usually £500 to £1,500 of the total. Two quotes for the same appliance can differ by more than the appliance costs.
Output and size
Sizing comes from radiator count, bathrooms and hot water demand, not floor area. An oversized boiler costs more to buy and then cycles inefficiently for the next decade.
Where it goes
Moving a boiler from a kitchen cupboard to the loft means new gas, flue and condensate runs, and awkward access is charged for.
What gets added
A power flush, magnetic filter, new controls or a thermostatic upgrade are each a few hundred pounds, and are often bundled into one line on the quote.
Warranty length
The long warranties come from a manufacturer-registered installer fitting that brand. It explains why quotes differ; it is not a reason to skip comparing them.
When you book it
Demand peaks the moment the weather turns, and lead times go with it. A replacement arranged in summer is usually easier to schedule and easier to negotiate on.
Grants and help with the cost
Most boiler replacements attract no grant at all. Help exists, but it is means-tested and tied to your household rather than to the boiler.
- ✓There is no general government grant for replacing a working gas boiler with a newer one.
- ✓Support for low-income and vulnerable households runs through energy supplier obligation schemes rather than through installers directly.
- ✓Boiler finance is widely offered. The total repayable is the number to compare, not the monthly figure.
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Boilers questions, answered
- How much is a new boiler in 2026?
- Between £1,800 and £3,500 fitted covers most UK replacements. A straight combi-for-combi swap sits at the bottom of that range, a conventional-to-combi conversion at the top, and a back boiler removal can pass £4,000.
- Why do boiler quotes vary so much for the same boiler?
- Because you are buying the installation, not the box. Labour and materials account for £500 to £1,500 of the price, and how an installer prices the pipework, flue, filter and flush is where the spread comes from.
- How long does a boiler replacement take?
- A like-for-like swap is usually a single day. A relocation or a conversion is two to three days, and a back boiler removal runs longer if the fireplace needs making good afterwards.
- How many quotes should I get?
- Three is where most people land. It is enough to see the spread on labour without spending a fortnight arranging visits.
- Can I compare boiler quotes on WhatDeal today?
- Yes. Answer a few questions about the job and up to three trusted, Gas Safe registered installers quote for the work, free and with no obligation.
Boilers guides & advice
Browse all guides →How long does a boiler last?
Most gas boilers last 10 to 15 years. What shortens that, the signs yours is near the end, and when repairing stops making sense.
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Boiler losing pressure: what to check before you call anyone
Why boilers lose pressure, how to repressurise one safely in five minutes, and the two signs the problem needs an engineer rather than a top-up.
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Boiler installation day: what actually happens
How long a boiler installation takes, what the engineer does hour by hour, what you need to do beforehand, and what should be in your handover pack.
Read the guide →
Condensing boilers explained, without the jargon
Every new boiler is a condensing boiler. What that means, why flow temperature decides your real efficiency, and the one pipe to know about.
Read the guide →
Power flush cost, and whether your system needs one
A power flush typically costs £300 to £600. What it does, the signs your system needs one, when a cheaper chemical flush does the job, and when to say no.
Read the guide →
Smart thermostats: worth it, and which features matter
What a smart thermostat actually saves, the three features that do the work, and when a £60 programmable stat beats a £200 smart one.
Read the guide →
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Prices and grant rules change. Checked August 2026, and worth confirming the grant details on GOV.UK before you commit to anything.