How Much Does a New Boiler Cost in the UK?
A boiler replacement is priced by the type of boiler, the brand, and whether it is a straight swap or a change of system. A gas engineer typically charges £280–350 a day.
Typical combi boiler replacement, supplied and fitted. Swaps are cheaper; conversions cost more.
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Cost by boiler type (supplied & fitted)
What affects the price
- •Boiler type and brand — premium brands with longer warranties cost more upfront.
- •Whether it is a straight swap or a change of boiler type or position (new pipework, flue and controls).
- •Moving the boiler to a new location adds significant labour.
- •A power flush of the system, new radiators or a smart thermostat.
- •Any gas or flue upgrades needed to meet current regs.
Regional price variation
Labour is the biggest regional swing. London and the South East typically run 20–30% above the national average, while the North of England, Scotland and Wales tend to sit 5–15% below it. Material prices are fairly consistent nationwide — it is day rates that move the total. The ranges on this page assume South of England pricing unless stated.
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Frequently asked questions
How much does a new boiler cost in the UK?
A new boiler typically costs £2,000–£4,500 supplied and fitted. A like-for-like combi swap is £1,800–£3,000, a new combi install £2,500–£4,000, and converting from an old back boiler to a combi £3,500–£5,500.
How much does it cost to fit a boiler?
Fitting labour is usually £500–£1,000 of the total for a straight swap, more if the boiler is being moved or the system changed. A Gas Safe engineer typically charges £280–350 per day.
Is it worth getting a more expensive boiler?
A better boiler often comes with a longer warranty (up to 10–12 years) and better efficiency, which can be worth the extra upfront cost over the boiler’s 12–15 year life. Correct sizing for your home matters more than brand alone.