How Much Does Boiler Installation Cost in 2025?
Last updated: February 2026
Average cost in United Kingdom
Typical average: £2,750
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Boiler Installation Cost by Country
| Country | Low | Average | High |
|---|---|---|---|
| 🇬🇧United Kingdom | £2,000 | £2,750 | £3,500 |
| 🇺🇸United States | $3,000 | $5,000 | $7,000 |
| 🇦🇺Australia | A$3,500 | A$5,000 | A$7,000 |
| 🇨🇦Canada | C$3,500 | C$5,500 | C$7,500 |
Boiler Installation Cost Breakdown
| Item | 🇬🇧 UK | 🇺🇸 US |
|---|---|---|
| Combi boiler (supply) | £800-1,500 | $1,500-3,000 |
| Installation labor | £500-1,000 | $1,000-2,000 |
| Flue and fittings | £100-300 | $200-500 |
| System flush | £300-500 | $400-700 |
| Relocation (if needed) | +£300-800 | +$500-1,500 |
What Affects Boiler Installation Cost?
Prices vary significantly by region and provider. For more information about typical hvac pricing, see our HVAC invoice auditing page, or browse all cost guides.
Frequently Asked Questions
Combi boilers are most popular for small-medium homes (no hot water tank needed). System boilers suit larger homes with multiple bathrooms. Regular boilers work with existing cylinder systems.
A straightforward like-for-like replacement takes 1 day. Moving the boiler location or changing boiler type can take 2-3 days.
Most quality boilers come with 5-10 year warranties. Extended warranties often require annual servicing.
The UK ECO4 scheme provides grants towards boiler replacement for qualifying households on certain benefits. Some local councils also offer boiler grants. Check the Simple Energy Advice service for eligibility.
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