How much does a new boiler cost?
The short answer
A new combi boiler typically costs £2,000–£3,500 fitted, including removing the old one. Moving it or changing system type adds more.
Typical prices
| Job | Typical cost | Time |
|---|---|---|
| Combi swap, same place | £2,000–£3,500 | 1 day |
| System boiler | £2,800–£4,500 | 1–2 days |
| Combi conversion | £3,500–£5,500 | 2–3 days |
| Full central heating | £6,000–£10,000 | 4–7 days |
Typical UK prices for 2025–26, including VAT. Estimates only: your quotes will vary by home, location and the work involved.
What affects the price
- Boiler type: combi, system or regular
- Moving the boiler or flue
- Brand and warranty length
- Whether pipework or a filter is needed
What's usually included
- The boiler, flue and controls
- Removing the old boiler
- A system flush and magnetic filter
- Gas Safe registration and warranty sign-up
Ways to bring the cost down
- Ask if a like-for-like swap in the same spot is possible
- Compare warranty lengths, not just price
- Get at least 3 quotes for the same spec
See what yours would costCompare up to 3 quotes from Gas Safe engineers near you.
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Questions people ask
How long does it take to fit a new boiler?
A like-for-like swap usually takes a day. Moving the boiler or converting to a combi can take two or three.
Do I need a Gas Safe engineer?
Yes. By law, anyone working on a gas boiler must be on the Gas Safe Register. You can check an engineer's ID card on the register's website.
Should I get a heat pump instead?
It's worth comparing. A grant can take up to £7,500 off a heat pump in England and Wales. You can ask for quotes for both.