How much does a new boiler cost in the UK?
A new boiler costs £1,800 to £4,500 in the UK, typically around £3,000 supplied and fitted. Prices reviewed June 2026.
A new boiler is priced by the type of swap and the brand. A straight combi-for-combi replacement is cheapest, and moving the boiler or changing system type costs more.
Price your new boiler
Adjust for your job and area to get a range. Nothing is sent anywhere.
New boiler cost breakdown
What a new boiler typically costs, by option:
| Type of job | Typical UK cost |
|---|---|
| Combi for combi swap | £1,800 to £2,800 |
| System / conventional swap | £2,500 to £3,600 |
| Convert or relocate | £3,300 to £4,800 |
| + Premium brand, 10 year warranty | add £400 to £900 |
What's included in the price?
A typical new boiler price includes:
- The boiler and standard flue
- Installation and commissioning
- A system flush
- Manufacturer warranty registration
What changes the price?
The things that move a new boiler price most:
Combi swap versus changing to or from a system boiler
Brand and warranty length
Whether the boiler is moved to a new location
Controls, filters and any pipework changes
Does where you live change the cost?
London adds around 15 to 25 percent on labour. The boiler itself costs about the same everywhere.
Common questions
A straight combi replacement with a mid-range brand typically costs £1,800 to £2,800 supplied and fitted. Premium brands and longer warranties cost more.
Converting from a system or conventional boiler to a combi removes the tanks and frees up space, but it adds £700 to £1,500 to the job because of the extra pipework and controls.
These are independent guide prices based on typical UK jobs in 2026. Your actual cost depends on your property, spec, access and where you live. Always get at least three written quotes before committing.