Boiler service cost: what a service includes and what it costs

Things worth knowing about an annual boiler service

• Standard single-boiler service typically costs £70 to £110 in 2026
• Most visits take 30 to 45 minutes with normal access to the appliance
• Loft-mounted or hard-to-reach boilers can add extra time and cost
• Manufacturer warranties usually require proof of an annual service
• A service is a safety check, not a repair, so any faults found are quoted separately

What is actually going on with an annual boiler service

A standard annual gas boiler service typically costs £70 to £110 in 2026 for a single boiler with reasonable access, and usually takes around 30 to 45 minutes on site. The engineer checks the flue for correct operation, tests gas pressure and combustion, inspects the heat exchanger and condensate arrangements, checks the pressure relief valve and expansion vessel, and confirms safety devices are functioning as designed. Multiple appliances, a first service after a period of neglect, or a boiler in a hard-to-reach position such as a loft can add to the time and therefore the price. Most manufacturers require an annual service to keep a multi-year warranty valid, so skipping a year can affect cover even if the boiler seems to be running fine.

Where we deal with this

• Combe Down (BA2) · 9 mi
• Paulton (BS39) · 3 mi
• Odd Down (BA2) · 8 mi
• Chew Magna (BS40) · 8 mi

Questions we get asked

What's actually checked during a service?

Flue operation, gas pressure and combustion readings, the heat exchanger, condensate system, pressure relief valve and safety devices are all checked and recorded.

Does a service fix problems it finds?

No. A service identifies issues and the engineer will explain any repair needed, but fixing a fault is quoted and carried out separately.

What happens if I miss a year?

The boiler itself won't be damaged by one missed service, but the manufacturer's warranty may be affected, so it's worth checking your specific terms.

Is a service the same as a landlord gas safety check?

No, they check different things and a service does not replace the legal landlord certificate, though both can sometimes be booked on the same visit.