7 REAL COSTS
New boiler
A like-for-like combi swap versus a system-to-combi conversion are very different bills, and national firms quote well above local installers.
Every price we track (hover a dot)
| Year | Region | Source | What it was | Paid | Src |
|---|---|---|---|---|---|
| 2021 | South East England | Real bills paid | new 30kW combi boiler supply and fit by local installeractually paid; 30kW; explicit Jan 2021 | £2,000 | source |
| 2021 | South East | Real bills paid | New 30kW combi boiler supply and fitpaid, 30kW, local fitter | £2,000 | source |
| 2024 | UK unspecified | Real bills paid | Boiler-only like-for-like swap (Worcester)Worcester boiler, boiler only, no other work, incl VAT & labour, ~2 hours work | £2,400 | source |
| 2022 | South East England | Real bills paid | new combi boiler installation (like-for-like)actually paid; year approx (thread ~2022) | £2,500 | source |
| 2022 | South East | Real bills paid | New combi boiler replacing a system boilerpaid; system-to-combi conversion | £2,500 | source |
| 2024 | UK unspecified | Real bills paid | New boiler fitted + old back boiler removedNew boiler fitted and old back boiler removed, boiler relocated from behind fireplace, some pipework relocation | £3,500 | source |
| 2024 | UK unspecified | Real bills paid | Back boiler capped off and replaced with combiOld back boiler capped off and replaced with a cheap/economy combi boiler | £4,700 | source |
Common questions
How much does boiler cost in the UK?
Across 7 real prices people actually paid, the median is £2,500, ranging from £2,000 to £4,700. These are real prices homeowners posted, not cost-guide estimates.
Why do boiler prices vary so much?
Size, spec, region and the individual trade all move the figure, and cost guides rarely say which. Seeing what real people paid, with the details they shared, gives you a far better benchmark than a single average.
Are these boiler prices quotes or actual bills?
Actual bills. We deliberately exclude quotes and estimates and only publish amounts people said they paid, each linked to the original post.
Related free guides
- New boiler cost in the UK: combi vs system prices →
- Combi boiler replacement cost: swap vs conversion →
- New boiler installation cost: labour and fitting prices in the UK →
- Boiler quote too high? The national-firm markup trick →
- Loft conversion cost UK: room-in-roof, dormer and hip-to-gable prices →
- Dormer loft conversion cost UK: why it costs more and what to expect →
Methodology: every price here is a real amount a UK homeowner said they paid, taken from a public forum post and linked to its source. We exclude quotes and estimates: paid, not quoted. We never invent figures and no sponsor can touch a number. Spot an error? Tell us and we'll fix or remove it fast.