Updated 13 September 2026

Boiler repair cost in the UK: 2026 guide

Boiler repair costs depend on the fault, parts, diagnostic time, boiler age and whether the visit is emergency or out of hours.

Boiler repair cost in the UK: 2026 guide
Market guide, not a tariff

Typical published guidance

Published 2026 UK guidance says many boiler repairs fall around £100–£500, with an average around £300 and more complex faults potentially higher.

Common boiler repair range£100–£500Depends on fault and replacement parts.
Wider published repair rangeabout £120–£750Complex or emergency repairs may fall outside the common range.
Typical gas boiler serviceabout £80–£120A service is not the same as a fault repair.

These figures are a sense-check only. Location, access, specification, VAT and the actual condition of the property can move a quote materially.

Price drivers

What can move the cost?

• Fault diagnosis• Replacement parts• Boiler make/model and age• Emergency/out-of-hours visit• Access• Whether additional system work is needed
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What the quote should include

✓ Diagnostic/call-out charge✓ Labour✓ Parts✓ Testing after repair✓ Any additional recommendations✓ VAT status
Before accepting

Questions worth asking

  • Is the call-out included in the repair price?
  • Are parts included?
  • Is the repair guaranteed?
  • What happens if the first diagnosis is wrong?
  • Is this repair economical compared with replacement?
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