Calculate your boiler replacement
Boiler price: supply vs installation vs total
Technology and specification drive the very wide range£1,200–£10,000
Common gas boiler appliance benchmarkAbout £1,500 average
Broad installation benchmark£1,000–£2,000
Supply and installation£2,500–£4,000
Straightforward replacement planning pointAbout £3,000
Complex conversions and alternative systems can cost more£3,000–£15,000
Common boiler extras
Why installed boiler quotes vary
- Like-for-like replacement versus changing system type.
- Moving the boiler or changing the flue/condensate route.
- Hot-water cylinder or pipework alterations.
- Controls, filters, system cleaning and radiator work.
- Boiler output, brand, warranty and access.
How to compare quotes correctly
Ask every installer to show the boiler model, labour, controls, flue kit, filter, system cleaning, disposal, commissioning and VAT. This makes two totals genuinely comparable.
Source
New Boiler Costs in 2026: Prices & Installation
Updated: March 2026
Used for supply-only, installation and installed replacement benchmarks.
Frequently asked questions
How much does a new boiler cost including installation in 2026?
A straightforward like-for-like combi replacement is currently around £2,500–£4,000, with a gas combi average total of about £3,000.
Is a £1,500 boiler price the full replacement cost?
Often not. Around £1,500 is a common supply-only average for combi, system and conventional boilers. Installation and any system changes need to be added.
How much does boiler installation cost?
Current Checkatrade guidance gives roughly £1,000–£2,000 as a broad installation-labour benchmark.
What extras should I check in a boiler quote?
Check moving the boiler, flue and condensate work, controls, magnetic filter, cleaning or flushing, pipework changes, cylinder work, disposal and VAT.