Boiler Replacement Costs UK 2026

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⚡ Boiler Replacement Costs
A gas boiler replacement in the UK typically costs £1,500–£4,500 installed in 2026, depending on boiler size, brand, and any pipework required.

Boiler replacement costs vary significantly by property size, installer, and whether any additional work — such as a new hot water cylinder or radiator upgrades — is needed. Get at least three quotes before committing.

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Gas Boiler Replacement vs Heat Pump

Replacing a gas boiler costs significantly less upfront than switching to a heat pump. However, the UK government's Boiler Upgrade Scheme (BUS) provides grants to support heat pump installation, and the long-term running costs and environmental credentials of a heat pump are generally superior for well-insulated properties.

If your home is well insulated and you are considering a long-term switch away from gas, it is worth getting comparative quotes for both a boiler replacement and a heat pump before making a decision.

Boiler Replacement Cost Guides by Region

Boiler replacement — London
£1,500–£4,500 typical range
Boiler replacement — Manchester
£1,500–£4,500 typical range
Boiler replacement — Birmingham
£1,500–£4,500 typical range
Boiler replacement — Leeds
£1,500–£4,500 typical range
Boiler replacement — Liverpool
£1,500–£4,500 typical range
Boiler replacement — Bristol
£1,500–£4,500 typical range
Boiler replacement — Edinburgh
£1,500–£4,500 typical range
Boiler replacement — Glasgow
£1,500–£4,500 typical range
Boiler replacement — Cardiff
£1,500–£4,500 typical range
Boiler replacement — Sheffield
£1,500–£4,500 typical range
Boiler replacement — Nottingham
£1,500–£4,500 typical range
Boiler replacement — Newcastle
£1,500–£4,500 typical range
Boiler replacement — Leicester
£1,500–£4,500 typical range
Boiler replacement — Coventry
£1,500–£4,500 typical range
Boiler replacement — Hull
£1,500–£4,500 typical range

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ECO4 Support for Boiler Replacement

The ECO4 (Energy Company Obligation) scheme can cover the full cost of a boiler replacement for eligible households. Eligibility is based on income, benefit receipt, and property energy efficiency rating. Check gov.uk for current ECO4 eligibility criteria.