New boiler cost explained: 2026 price ranges and what changes them

Things worth knowing about a new boiler

• Straightforward combi swaps generally run £1,800 to £2,800 fitted in 2026
• System boiler installs with cylinder work typically add £600 to £1,200 on top
• Converting boiler type (regular to combi, or vice versa) is usually the biggest single cost driver
• A premium brand or higher output model can add several hundred pounds over a mid-range choice
• Oil boiler installs typically run £2,800 to £4,500 once tank and supply pipework are included

Where a new boiler usually comes from

A like-for-like combi replacement in an easily accessed property, using a mid-range appliance such as a Worcester Bosch Greenstar or Ideal Logic, typically lands between £1,800 and £2,800 fitted in 2026, including a magnetic filter and basic controls. Moving to a system boiler with a cylinder, converting from a regular boiler to a combi, or installing in a loft or awkward location pushes the figure up toward £3,200 to £4,200, once extra pipework, cylinder work and longer flue runs are priced in. Oil boiler installations tend to sit a little higher again, generally £2,800 to £4,500, because the appliance itself costs more and tank or supply pipe work is often involved.

A new boiler in Somerset and North Somerset homes

Across the villages between Radstock and Peasedown St John, a lot of the boilers we quote for are 12 to 18 year old combis in similar terraced or semi-detached properties, so like-for-like swaps with modern equivalents are common and tend to sit at the lower end of the range. Out toward Frome and the more rural parts of BS39 and BS40 we see more oil installations, where tank condition and supply pipe age often add to the final figure once a survey has actually been done.

Where we deal with this

• Clutton (BS39) · 5 mi
• Hinton Blewett (BS39) · 5 mi
• Hilperton (BA14) · 10 mi
• Rowde (SN10) · 14 mi
• Twerton (BA2) · 7 mi

Questions we get asked

Is the cheapest quoted boiler always the best value?

Not necessarily. Check what warranty length, filter and controls are included before comparing a headline figure against another quote.

Does boiler brand make a big difference to cost?

It can add a few hundred pounds either way, but appliance type and the amount of surrounding work usually matter more than brand alone.

Can I get a fixed price before a survey?

A rough estimate is possible from a description, but a fixed price needs a survey to check pipework, flue route and access properly.

Do prices vary much between Bath and rural villages?

Labour rates are similar across our coverage area, but access and existing pipework condition, which vary more in older rural properties, affect the final figure more than location itself.