As heating engineers, one of the most common questions we get is: “How much does a new boiler cost?” And the honest answer is — it depends. But to give you a solid starting point, here’s what you can expect in the UK right now:
🔧 Average Boiler Replacement Costs
| Boiler Type | Price Range (Installed) |
|---|---|
| Combi Boiler | £1,800 – £3,000 |
| System Boiler | £2,000 – £3,500 |
| Regular (Heat-Only) | £2,000 – £3,500+ |
These prices include:
- The boiler itself
- Standard installation
- Labour
- Pipework adjustments (if minor)
- Removal of the old unit
💡 What Affects the Cost?
Several things can push the price up or down:
- Boiler Type: Combi boilers are usually cheapest to install (especially if you’re replacing like-for-like). System and regular boilers often involve more pipework, tanks, and labour.
- Property Size: Bigger homes with more radiators or bathrooms need more powerful boilers — and sometimes a hot water cylinder or extra components.
- Brand and Model: Top-end models from Worcester Bosch, Vaillant or Viessmann will cost more upfront — but can save you more in the long run on energy and maintenance.
- Complexity of Installation: A simple swap (e.g. combi for combi, in the same location) is cheaper. Moving the boiler, changing pipework, or upgrading the gas supply will cost more.
- Controls and Add-ons: Smart thermostats, magnetic filters, system cleans or flushes, or weather compensation kits can all be added for extra performance (and extra cost).
🔍 Typical Example:
Replacing an old combi boiler with a new Worcester Bosch combi in the same location, including a filter, wireless thermostat, and system flush:
Roughly £2,200–£2,600 all-in.
🛠️ Is It Worth Paying More for a Premium Brand?
In our experience — yes, often it is.
A boiler from Worcester Bosch, Vaillant or Viessmann might cost a few hundred more, but you’re getting:
- Better build quality
- Longer warranties (up to 10–12 years)
- Quieter operation
- Easier maintenance and better parts availability
You’ll likely save money in the long term — and reduce the risk of breakdowns.
✅ Need a Personal Quote?
Every home is different, so we always recommend a quick site visit or video consultation to give you a fixed price. No guesswork, no hidden fees.
If you’ve already got a boiler and it needs replacing, installing, repairing, or any other problems, fill in the form below.