What is the cost to replace a boiler in 2026 in London?

In 2026, the cost to replace a boiler in London typically ranges from £2,500 to £5,000, depending on the type and efficiency of the boiler you choose. For instance, a standard combi boiler can cost between £2,500 and £3,500, while a high-efficiency model may set you back up to £5,000 including installation. Additional costs may arise from any necessary upgrades to your heating system or repairs to existing pipework.

When selecting a plumbing professional, ensure they are Gas Safe registered, as this certification guarantees their competence in safely fitting and maintaining gas appliances. Moreover, if you opt for a more complex installation or require modifications to your existing plumbing, expect to budget for an additional £500 to £1,000.

In London, it's also beneficial to check if your new boiler qualifies for government energy efficiency schemes, which may offer rebates or financial incentives. Always obtain multiple quotes to ensure you get the best value for your replacement.

Looking for professionals in your area? Find vetted providers on TradeMatch.