Understanding boiler replacement costs before you get quotes puts you in a much stronger position. This guide explains what affects the price of a new boiler installation and gives you realistic ranges to work with — without the hard sell.
Several factors influence the final cost: the type of boiler (combi, system, regular), the brand and model, the output size required, the complexity of the installation (like-for-like vs conversion), any required flue changes, and your location. Labour costs can also vary by region.
A standard combi boiler replacement (like-for-like) typically falls in the range of £1,500–£3,500 fully installed, depending on brand and model. System boiler replacements are broadly similar. Conversions (e.g., from a regular boiler to a combi) tend to be higher due to the extra work involved. Premium brands like Viessmann or Worcester Bosch carry a higher upfront cost but may offer longer warranties and lower long-term running costs.
When Norvera arranges your replacement, we provide a fixed price before any work begins. The quote covers the boiler, all installation labour, flue, fittings, and disposal of your old unit. There are no hidden extras — the price quoted is the price you pay.
From your first message to a working boiler — here's what to expect.
Answer a few short questions. Takes about two minutes. You can add photos of your boiler or any error codes showing.
We connect you with a Gas Safe registered installer in your area who can visit quickly and assess the job.
Your installer gives you a clear written price before anything starts. No surprises and no obligation to proceed.
Answers to the questions we hear most often.
Answer a few questions and we'll connect you with a Gas Safe installer in your area.
Gas Safe registered installers · Fixed-price quotes · No obligation