UK 2026 / May 2026
Worcester Bosch boiler replacement cost
UK manufacture, German parent (Bosch Thermotechnik)
UK 2026 installed cost range for Worcester Bosch: GBP 2,200 - GBP 3,800 depending on model + kW + install complexity. Boiler-only unit price: GBP 1,100 - GBP 2,400.
Position in the UK market
UK market-share leader. Tops installer recommendation surveys (Which? Best Buy, Trustpilot).
Best for: Households who want the safest brand choice, willing to pay 10-20% premium over Ideal / Baxi for that reassurance
Worcester Bosch models + prices
Unit prices are 2026 RRPs cross-checked against Heatable and BOXT installer-direct pricing. Installed cost adds GBP 700-GBP 1,500 of labour, flue, filter, flush, and Building Control on top.
| Model | Type | kW range | Unit RRP |
|---|---|---|---|
| Greenstar 4000 (combi) | Combi | 25, 30 kW | GBP 1,100 - GBP 1,450 |
| Greenstar 8000 Life (combi) | Combi | 30, 35, 40, 50 kW | GBP 1,800 - GBP 2,400 |
| Greenstar 8000 Lifestyle (system) | System | 15, 18, 25, 30 kW | GBP 1,600 - GBP 2,300 |
| Greenstar Ri (regular / heat-only) | Regular | 12-30 kW | GBP 1,000 - GBP 1,400 |
Warranty
Up to 12 years (Greenstar 8000 Life via accredited installer). Full warranty term typically requires (a) installation by an accredited installer, (b) annual service by a Gas Safe registered engineer, and (c) magnetic filter + system inhibitor fitted at install. Register the warranty within 30 days of install.
Strengths + watch-outs
Strengths
- Longest UK volume installer network (over 9,000 accredited installers)
- Parts availability strongest in the market
- 12-year warranty on Greenstar 8000 Life with accredited install + annual service
- Quiet operation: 8000 Life cited at 45 dB
Watch-outs
- 10-20% price premium over Ideal / Baxi for similar kW output
- Full 12-year warranty requires accredited-installer route (Worcester Trade Accredited Installer + annual service)
- Entry-level Greenstar 4000 only gets 10-year warranty
Frequently asked
How much does a Worcester Bosch boiler cost installed?
Installed cost range for Worcester Bosch in UK 2026 is GBP 2,200 - GBP 3,800 all-in including supply, labour, removal, flue, filter, and Gas Safe certification. The unit itself is GBP 1,100 - GBP 2,400 depending on model + kW.
What warranty does Worcester Bosch offer?
Up to 12 years (Greenstar 8000 Life via accredited installer). Full term typically requires accredited installer + annual service + magnetic filter and system inhibitor.
Is Worcester Bosch a reliable UK boiler brand?
UK market-share leader. Tops installer recommendation surveys (Which? Best Buy, Trustpilot). Annual Gas Safe Register and Which? installer recommendation surveys consistently rate this brand in the top tier of UK domestic boiler manufacturers.
How do I find an accredited installer?
Worcester Bosch publishes an accredited installer search on their UK site. Independently, you can verify any installer at gassaferegister.co.uk. Always ask to see the Gas Safe ID card before work begins. For approved-installer status (required for the full warranty term), check the manufacturer's directly.
Compare against other brands on the by-brand index. Still deciding which type? cost by type.