How much does a new boiler cost in the UK?
A new combi boiler typically costs around £2,800 fitted in 2026, though prices range from about £1,900 for a straightforward like-for-like swap to £4,000+ for more complex installs or premium brands. Here’s what to expect, what drives the price, and how to make sure your quote is fair.
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Prices vary across the UK — London and the South East run highest, the North, Scotland, Wales and Northern Ireland tend to be lower. Here’s the typical range for a combi boiler swap by region in 2026:
| Region | Typical range | Average |
|---|---|---|
| London & South East | £2,470 – £5,200 | £3,640 |
| South & Midlands | £1,900 – £4,000 | £2,800 |
| North England | £1,672 – £3,520 | £2,464 |
| Scotland | £1,710 – £3,600 | £2,520 |
| Wales | £1,653 – £3,480 | £2,436 |
| Northern Ireland | £1,615 – £3,400 | £2,380 |
Figures are indicative 2026 UK averages for guidance. Your actual quote depends on the specifics of your property and job.
What affects the price?
- Boiler type — a like-for-like combi swap is cheapest; converting from a system or conventional boiler costs more due to extra pipework.
- Brand and warranty — Worcester Bosch, Vaillant and Viessmann sit at the premium end; budget brands are cheaper but may have shorter warranties.
- Moving the boiler location — relocating to a different wall or room adds flue, pipework and labour costs.
- Existing system condition — a power flush, new filter or pipework upgrades may be recommended and added to the quote.
- Your region — London and the South East run around 30% above the North, Scotland and Wales.
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