| By Chandraketu Tripathi | Updated April 2026 | ||||||||||||||||||||||||||||||
| A new boiler is one of the largest home expenses most people face — typically £1,800 to £4,500 installed. The right type depends on your home’s hot water demand, existing pipework and whether you have a hot water cylinder. Here is what a new boiler costs in 2026 and how to avoid overpaying. | ||||||||||||||||||||||||||||||
Verdict 2026 Combi boiler installed: £1,800–£3,500 | System boiler installed: £2,000–£4,000 | Heat-only boiler installed: £2,500–£4,500 | Heat pump (alternative): £7,000–£15,000 | Lifespan: 10–15 years | ||||||||||||||||||||||||||||||
New Boiler Costs UK 2026 by Type | ||||||||||||||||||||||||||||||
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What Is Included in the Installation Cost? | ||||||||||||||||||||||||||||||
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Top Boiler Brands UK 2026 | ||||||||||||||||||||||||||||||
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Repair vs Replace: When Should You Get a New Boiler? | ||||||||||||||||||||||||||||||
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Government Grants for Boilers 2026 | ||||||||||||||||||||||||||||||
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Verdict 2026 A new combi boiler installed costs £1,800–3,500 in 2026. Worcester Bosch and Viessmann are the most reliable brands. Replace rather than repair if the boiler is over 10 years old and repair costs exceed £500. The Boiler Upgrade Scheme offers £7,500 towards a heat pump but not a gas boiler. Always get 3 quotes and check the installer is Gas Safe registered. | ||||||||||||||||||||||||||||||
Frequently Asked QuestionsHow much does a new boiler cost installed UK 2026? A new combi boiler fully installed typically costs £1,800–3,500. System boilers cost £2,000–4,000 installed. Heat-only boilers cost £2,500–4,500. Heat pumps cost significantly more at £7,000–15,000 but attract government grants. What is the most reliable boiler brand UK? Worcester Bosch is consistently rated as the most reliable boiler brand in the UK and wins Which? Best Buy awards regularly. Viessmann and Vaillant are also highly rated. All come with 10+ year warranties when serviced annually. Is it worth replacing a 15-year-old boiler? Almost certainly yes. Boilers over 15 years old are significantly less efficient than modern condensing boilers (which operate at 90%+ efficiency vs 70–80% for older units). The energy savings alone often justify replacement within 3–5 years. | ||||||||||||||||||||||||||||||
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| Sources: Which? boiler survey 2025, Gas Safe Register, Worcester Bosch, Viessmann, Vaillant pricing 2026, OFGEM, Boiler Upgrade Scheme GOV.UK. April 2026. |
New Boiler Cost UK 2026: Installation Prices, Types and How to Save Money
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