UK 2026 / May 2026
Boiler replacement cost by brand
Five UK domestic boiler manufacturers worth comparing. Cost differences track the unit RRP plus brand-specific install requirements (e.g. accredited-installer route for full warranty term). Click into any brand for model-by-model pricing.
Side-by-side
| Brand | Installed cost | Unit RRP | Warranty up to | Best for |
|---|---|---|---|---|
| Worcester Bosch | GBP 2,200 - GBP 3,800 | GBP 1,100 - GBP 2,400 | 12 years (Greenstar 8000 Life via accredited installer) | Households who want the safest brand choice, willing to pay 10-20% premium over Ideal / Baxi for that reassurance |
| Vaillant | GBP 2,100 - GBP 3,600 | GBP 1,150 - GBP 2,200 | 10 years (Advance Guarantee via Advance Installer) | Households who value engineering precision, willing to pay a slight premium for German build quality |
| Ideal | GBP 1,800 - GBP 2,900 | GBP 800 - GBP 1,750 | 12 years (Vogue Max via accredited installer) | Households on a tighter budget who still want a strong warranty and modern feature set |
| Baxi | GBP 1,700 - GBP 2,700 | GBP 700 - GBP 1,450 | 10 years (800 Combi via Baxi Works installer) | Cost-conscious replacements where reliability and parts availability matter more than premium feel |
| Viessmann | GBP 2,400 - GBP 4,000 | GBP 1,350 - GBP 2,400 | 10 years (Vitodens 100-W via Trained Installer) | Households prioritising longevity and willing to pay top-end UK domestic boiler pricing |
The five brands at a glance
Worcester Bosch
GBP 2,200 - GBP 3,800
UK manufacture, German parent (Bosch Thermotechnik)
UK market-share leader.
Vaillant
GBP 2,100 - GBP 3,600
Germany (Vaillant Group, Remscheid)
Europe's largest heating technology company.
Ideal
GBP 1,800 - GBP 2,900
UK (Hull)
UK manufacturer with strong installer following on value range.
Baxi
GBP 1,700 - GBP 2,700
UK (Warwick, BDR Thermea Group)
One of Britain's oldest boiler manufacturers (over 150 years of UK manufacturing).
Viessmann
GBP 2,400 - GBP 4,000
Germany (Allendorf)
Premium German manufacturer renowned for stainless steel heat exchangers and engineering excellence..
How to pick
- Want the safest choice with the biggest installer network: Worcester Bosch.
- Want German engineering precision and the quietest operation: Vaillant.
- Want the best value for money on a strong warranty: Ideal Logic Max.
- Want UK-made affordability with solid parts supply: Baxi.
- Want premium build quality and a stainless steel heat exchanger: Viessmann.
Brand decision usually settles after the type decision. If you're not sure which type yet, start with cost by boiler type.