How Much Does a New Boiler Cost in 2026?
Replacing your boiler improves energy efficiency and heating reliability. In 2026, a new boiler installation in the UK costs between £1,800 and £5,000 depending on the boiler type and complexity of the work.
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Entry-level combi boiler, like-for-like swap in the same position. 5-year warranty.
Premium combi or system boiler, smart thermostat included. 7–10 year warranty.
Top-brand boiler, full system upgrade with new radiators, magnetic filter, and powerflush.
Factors That Affect the Cost
- Boiler type (combi, system, regular/heat-only)
- Brand, model, and warranty length
- Relocation of the boiler to a new position
- System upgrades (radiators, pipework, cylinder)
- Smart thermostat installation
- Gas Safe certificate and building notice
Regional Price Variations
Boiler installation costs are fairly consistent across the UK, though London labour rates add 10–20%. Rural areas may incur additional travel charges from Gas Safe engineers.
Frequently Asked Questions
What type of boiler do I need?
Combi boilers suit most homes with 1–2 bathrooms. Larger homes with multiple bathrooms benefit from a system boiler with a separate hot water cylinder.
How long does a boiler installation take?
A straightforward like-for-like swap takes 1 day. Relocations or system upgrades can take 2–3 days.
How often should I replace my boiler?
Most boilers last 10–15 years. If yours is over 10 years old and needing frequent repairs, replacement is usually more cost-effective.
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