How much does a new boiler cost in the UK in 2026?

A new boiler is a significant investment, so it is natural to want a clear idea of the cost before you commit. Prices vary widely across the UK, but understanding the main factors helps you get a realistic budget and avoid paying over the odds.

This guide gives typical price ranges for 2026 and explains what drives the final cost. For an accurate figure for your property, a Gas Safe engineer should assess the system on site.

Typical boiler price ranges

As a guide, the cost of a new boiler and installation in the UK is roughly:

• Combi boiler: the most popular type for smaller homes — typically £1,500 to £3,000.
• System boiler: good for homes with more than one bathroom — typically £1,800 to £3,200.
• Regular (conventional) boiler: suits homes with a traditional hot water cylinder — typically £1,700 to £3,200.

These figures include the boiler unit and a standard installation. Premium brands and larger outputs sit at the top of the range.

What affects the final cost

Several factors push the price up or down:

• Boiler type and output — a bigger property needs a larger boiler.
• Brand — premium makes such as Worcester Bosch, Vaillant, Ideal and Baxi cost more.
• Old boiler removal and disposal — the gas-safe dismantling of the existing unit.
• New gas pipe or flue work — relocating the flue or upgrading the gas supply adds cost.
• System updates — a powerflush or new magnetic filter can be recommended alongside the install.
• Location — labour rates are generally higher in London.

Always get a written quote that lists the boiler, labour, and any extras separately.

The installation process

A typical boiler installation takes one to two days. A Gas Safe engineer removes the old unit, fits the new one, connects the gas and flue, and carries out safety checks. After installation, you should receive the relevant certification and be shown how to use the system.

For landlords, a new boiler should also be covered by an annual gas safety check. See our guide to landlord gas safety certificates for what is required.

Is a new boiler worth it?

Modern A-rated condensing boilers are more efficient, which can lower running costs. If your current boiler is over ten years old, frequently breaking down, or expensive to run, replacing it can save money over time. In some cases a powerflush or repair is the cheaper option, so it is worth getting an assessment first.

If you are deciding between repair, a flush, or replacement, our heating service can advise on the right move for your system and budget. Get in touch via our contact page for a transparent, no-obligation quote.

For independent cost and efficiency information, the Which? boiler guides and the Energy Saving Trust are useful, authoritative sources.