Discover how much it really costs to install a new boiler in London in 2025. ARA Services Ltd offers transparent quotes, expert fitting, and certified Gas Safe engineers to get your heating running efficiently.
Whether you need a combi boiler, system upgrade, or complete heating replacement, we provide honest pricing, quick turnaround times, and friendly, professional service across Kensington, Chelsea, Stratford, and beyond.
In 2025, the average boiler installation cost in the UK ranges between £1,000 and £2,000 for labour alone. Including the boiler, most homeowners pay between £3,000 and £10,000 depending on boiler type, size, and complexity.
| Job Type | Estimated Cost (2025) | Includes |
|---|---|---|
| Simple like-for-like replacement | £1,000 – £1,500 | Labour only |
| Combi boiler installation | £1,800 – £2,800 | Mid-range model |
| System boiler replacement | £1,500 – £3,000 | Supply + install |
| Boiler conversion (regular → combi) | £3,500 – £5,000 | New pipework + removal |
| Biomass boiler installation | £5,000+ | Eco-friendly system |
Combi boilers are compact, efficient, and provide instant hot water — costing around £2,500–£4,000 installed. System boilers suit larger homes with multiple bathrooms, averaging £3,000–£5,000. Conventional boilers remain ideal for older systems or large water demands, typically £3,000–£6,000 fitted. Compare energy types in our Gas vs Electric Boilers Guide.
Yes — older boilers operate at 60–70% efficiency, compared to modern A-rated boilers at 90%+. Upgrading can reduce bills by up to 30%. Learn more in Are High-Efficiency Boilers Worth the Investment?.
Check for grants like the Boiler Upgrade Scheme or ECO4. Compare quotes from multiple boiler installers for affordable installation options.
Modern boilers last around 10–15 years with annual servicing. Regular maintenance by a Gas Safe engineer can extend lifespan beyond 20 years.
Yes. Electric boilers can work with existing pipework and radiators, offering a lower-carbon alternative to gas systems. See our Gas vs Electric Boilers Guide for a full comparison.
ARA Services provides boiler installation, servicing, and emergency plumbing across London, Essex, and surrounding areas. Call our team on 07727 154746 for 24-hour service or explore the best boiler brands for 2025 for reliable replacements.