How Much Does a New Boiler Installation Cost in 2025?
The cost of a new boiler installation in the UK varies depending on the type of boiler, property size, and complexity of the installation. At ARA Services Ltd, we provide transparent pricing for Gas Safe boiler installations across London — including both supply and fitting. You can also explore the best boiler brands for homes in 2025 to help you choose a model that fits your budget and efficiency goals.
Average Boiler Prices in 2025
In 2025, new boiler installations typically range from £1,800 to £4,500 including installation. This varies based on boiler type, energy rating, and any additional work such as pipe upgrades or flue replacements. For a deeper comparison of boiler types, see Combi vs System vs Regular Boilers.
Get a Free QuoteBoiler Installation Cost Breakdown (2025)
| Boiler Type | Average Cost (Supply & Fit) | Typical Property Size |
|---|---|---|
| Combi Boiler | £1,800 – £2,800 | Flats & small homes |
| System Boiler | £2,300 – £3,500 | Medium homes |
| Regular / Heat Only Boiler | £2,800 – £4,500 | Large properties |
Additional Costs to Consider
- Power flush or pipe upgrades: £300 – £600
- Smart thermostat (e.g. Hive, Nest): £150 – £300
- Magnetic filter installation: £100 – £200
- Boiler relocation or flue work: £400 – £800
Regular servicing is vital to protect your investment. Find out how often you should service your boiler to maintain efficiency and safety.
Government Boiler Grants (ECO4 & Boiler Upgrade Scheme)
Homeowners in the UK may qualify for a free or subsidised boiler installation under the ECO4 scheme or the Boiler Upgrade Scheme (BUS). These programs help improve energy efficiency and reduce heating costs for eligible households. Check your eligibility in our full guide to Boiler Installation Grants & Government Schemes Explained.
- ECO4 (Energy Company Obligation): Available to low-income households or those receiving benefits.
- Boiler Upgrade Scheme: Offers up to £7,500 off renewable heating systems like heat pumps.
How to Save on Installation Costs
- Choose a high-efficiency A-rated boiler to lower long-term bills — learn more in Are High-Efficiency Boilers Worth the Investment?.
- Install during off-peak months (spring/summer) for better rates.
- Get multiple quotes from Gas Safe registered installers.
- Maintain your boiler annually to extend lifespan and avoid breakdowns.
Want to reduce your monthly bills even further? Read How to Save Money on Heating Bills with a New Boiler for practical advice.
Related Boiler Guides
FAQs
What is the average cost of a new boiler in 2025?
Most homeowners in the UK pay between £1,800 and £3,500 including installation.
Costs depend on the system type — check our boiler comparison guide for details.
Do boiler grants cover full installation?
Yes — under ECO4, some qualifying households may receive a full or partial grant covering both the boiler and installation.
Learn more in our boiler grants guide.
Are high-efficiency boilers worth the price?
Absolutely. A-rated boilers can reduce annual heating bills by up to 20% and pay back the cost in energy savings.
See our full breakdown of high-efficiency boiler savings.