2026 Boiler Installation Prices
Real 2026 prices to supply and install combi, system and regular boilers — Worcester, Vaillant, Ideal and Viessmann — from Gas Safe registered engineers.
Typical UK boiler installation prices
Supply + fit, including flue, controls and 10-year parts & labour guarantee where available.
Prices include VAT & standard installation. Your exact quote will reflect your property & postcode.
What affects boiler installation prices?
The six biggest factors that push your boiler quote up or down.
Boiler brand & model
Worcester Bosch & Vaillant sit at the premium end. Ideal Logic & Baxi offer strong budget options.
Boiler type & size
Combi is cheapest to install. System & regular boilers need cylinder work.
Relocation
Moving a boiler to a different room adds £400–£900 in pipework & flue.
Power flush required?
Systems over 10 years old often need flushing (£300–£500) to keep your guarantee valid.
Smart controls
Nest, Hive or Google Home thermostats add £150–£300 supply + fit.
Region
London engineers charge 25–40% above national average labour rates.
How much does a new boiler cost in 2026?
The average UK price for a like-for-like combi boiler replacement is £2,690, supplied and fitted. A full system conversion (combi from regular, with pipework) runs £3,500–£4,500.
0% finance is available from most of our matched installers, spreading the cost over 24–60 months.
Which boiler should I buy?
- Worcester Bosch — Which? Best Buy for 15 years running. 10-year guarantees common.
- Vaillant — German engineering, very quiet. Excellent mid-premium choice.
- Ideal Logic — Best budget option. 10-year guarantee on the Logic Max.
- Viessmann — Rapidly growing market share, great efficiency.
Combi, system or regular?
Combi is best for homes with 1 bathroom. No tank needed, instant hot water. System is best for 2+ bathrooms (hot water stored in cylinder). Regular/conventional is for older homes with existing open-vented systems.
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