Boiler Replacement Cost — What to Expect
Average boiler replacement costs in the UK — what affects the price and how to save money.
Typical cost£999 – £3,500
Boiler Replacement Costs Explained
Replacing a boiler in 2025 costs between £999 and £3,500. The average UK homeowner spends around £1,800 for a standard combi boiler replacement including installation.
Factors That Affect the Cost
- Boiler type (combi, system, heat only)
- Brand and model specification
- Output size required (kW)
- Relocation of the boiler
- Flue length and type
- New pipework or radiators required
- Regional labour rates
How to Save on Boiler Replacement
Take advantage of government grants (ECO4 or Boiler Upgrade Scheme) if you're eligible, get multiple quotes, and choose a reputable installer who offers a long parts and labour warranty.
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