How much does a new boiler cost?
What a boiler replacement involves, what makes one quote higher than another, and how to see the typical price for your home in 30 seconds.
Tell us about your home and we'll show the typical UK price range for this job, what's involved and what to ask, in about 20 seconds. The job is already filled in: change anything that's different.
What the job involves
- A survey of your heating, hot water use and where the flue can go.
- Draining the system, removing the old boiler and any tanks or cylinder you no longer need.
- Fitting the new boiler, flue, filter and controls, and flushing the system.
- Testing, a gas safety check, registering the warranty and notifying building control.
What moves the price
- Combi swap in the same place costs least; moving the boiler or converting from a system or back boiler adds days of work.
- The boiler's make, output and warranty length.
- A power flush, magnetic filter and new controls (often required for the longer warranty).
- Flue position and access: a new flue route or loft installation adds cost.
- Where you live: London and the South East run higher.
Before you say yes
- Gas Safe registration for boilers, and their ID card.
- A written, itemised quote with the warranty length and who registers it.
- The engineer notifies building control, and you get a building regulations compliance certificate.
Questions people ask
Should I repair or replace an old boiler?
If it is over about 12 to 15 years old, needs an expensive part, or keeps breaking down, replacing usually makes more sense. A Gas Safe engineer can tell you after a look.
Ready for quotes?
The surest price is a real quote. Post the job once, free, and up to three local trades text or ring you back, usually within a few hours.
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General guidance from LocalWins, last checked October 2026. It is not legal advice or a planning decision, and every home is different: confirm anything important with your council or a qualified professional.