Boiler Replacement Cost in London: 2026 Price Guide
Last updated:
This page contains affiliate links. We may earn a commission if you purchase through them, at no extra cost to you.
Replacing an ageing gas boiler with a new high-efficiency unit can reduce heating costs. For a greener alternative, consider a heat pump instead. The Energy Saving Trust recommends getting at least three quotes from MCS-certified installers before committing.
Boiler Replacement Costs in London: What to Expect
Boiler replacement costs include the new unit, fitting, and any pipework or control upgrades required. Modern condensing boilers are significantly more efficient than older systems. If you are considering a long-term switch to a heat pump, it is worth comparing the total costs before committing to a gas boiler replacement.
Labour and equipment costs in London are broadly in line with the UK national average. However local factors including accessibility, building type, and competition among installers in the region can affect the final price. The figures above are based on MCS guidance and published industry research; always get multiple quotes before committing.
How to Get the Best Price for a Boiler Replacement in London
- Always get at least three quotes from MCS-certified installers — prices vary significantly between installers.
- Use the MCS Certified Installer finder to identify accredited local installers in London.
- Check gov.uk for any grants or schemes that apply to your household before committing.
- Compare quotes on panel/unit brand, inverter type, warranty length, and total installed cost — not just headline price.
Grants and Financial Support in London
The Boiler Upgrade Scheme (BUS) supports replacement of gas boilers with heat pumps. For like-for-like boiler replacement, ECO4 may provide support for eligible households. Check gov.uk for current schemes. Always check gov.uk for current eligibility and amounts before making any financial decisions — schemes change regularly.
Frequently Asked Questions
Complete Your Green Energy Upgrade
- Combine Boiler Replacement with battery storage, solar panels, and EV charging for maximum savings
- Use the MCS finder to compare local installers who cover the full range of green energy products
- Check gov.uk for bundled grants — some schemes cover multiple products in a single application
Financing Your Boiler Replacement? Check Your Credit Score First
Lenders check your credit score when you apply for 0% APR finance on home energy installations. SmartCredit gives you full three-bureau credit reports, a score simulator, and credit monitoring — so you can improve your score before you apply.
Try SmartCredit for $1 for 7 Days →Promotional offer. Ad — we may earn a commission.
Smart Energy Management Tools
Get more from your Boiler Replacement investment with smart home energy tools. A home energy monitor tracks consumption in real time, while a smart thermostat helps schedule heating around your system's output.
Control individual sockets and cut standby drain automatically.
Check Price →Schedule appliances around your energy system's output — tumble dryer, dishwasher, washing machine.
Check Price →