BoilerFaultCodes Free tool
Boiler replacement cost calculator (2026 UK)
Answer five quick questions for an instant estimate. Based on 2026 UK install prices from Boxt, Heatable, iHeat and Checkatrade local engineers.
Your estimated cost
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This is a rough estimate from market data. Actual quotes will vary — always get three.
How we calculate this
Prices are built from 2026 UK market data — Boxt, Heatable, iHeat fixed-price quotes and Checkatrade local engineer averages. The mid-range figure reflects what most homeowners actually pay; your quote could be lower or higher depending on specifics the calculator can't see (gas supply condition, scaffold needs, pipework routing).