New Boiler Cost Calculator — UK Prices 2025
New Boiler Cost Calculator
Enter your details for an instant estimate
Remove old boiler?
Flue relocation?
Urgent?
Adds ~20% to labour
Prices automatically adjust for your region
Fill in the details on the left to see your cost estimate
How much does new boiler cost in the UK?
Use our calculator above to get an accurate estimate based on your specific requirements. Prices are based on real quotes from UK tradespeople and updated quarterly.
What affects the cost of new boiler?
- Location: London and the South East are 15–40% more expensive than the national average.
- Size and complexity: Larger or more complex jobs cost proportionally more.
- Material quality: Budget, mid-range and premium specifications can vary by 2–3x.
- Time of year: Demand peaks in spring and summer — book in winter for better availability and pricing.
- Access: Difficult access (scaffolding, confined spaces) adds to labour costs.
How to save money on new boiler
- Get at least 3 quotes from different tradespeople.
- Book during quieter periods (January–March for most trades).
- Be flexible on start dates — tradespeople often discount for convenient scheduling.
- Supply your own materials where possible (but confirm with your tradesperson first).
- Combine jobs — having multiple trades on site at once can reduce overall costs.
How to find a good tradesperson
Always check reviews on Checkatrade, Rated People or MyBuilder. Ask for references from recent similar jobs. Ensure they are appropriately qualified and insured. Never pay the full amount upfront — a deposit of 10–25% is standard.
Frequently asked questions
How much does a new boiler cost in the UK?
A new combi boiler costs £1,500–£4,500 fully installed in 2025. The boiler unit itself costs £600–£2,000, with installation labour adding £600–£1,400. System and heat-only boilers cost slightly more due to additional components.
How long does a boiler installation take?
A straightforward boiler swap takes 1–2 days. If the flue needs relocating or pipework needs upgrading, it can take 2–3 days.
What is the best boiler brand in the UK?
Worcester Bosch, Vaillant, and Ideal are consistently rated as the most reliable boiler brands in the UK. Worcester Bosch and Vaillant typically come with 10-year warranties when installed by their approved engineers.
Should I get a combi or system boiler?
A combi boiler is best for smaller homes (1–3 bedrooms) with one bathroom. A system boiler suits larger homes with multiple bathrooms and higher hot water demand. If you have a large family or multiple bathrooms, a system boiler with a cylinder is usually better.
Can I get a free boiler from the government?
The ECO4 scheme provides free or heavily subsidised boilers to households on certain benefits or with low EPC ratings. Check eligibility at gov.uk/energy-company-obligation.