How Much Does a Boiler Service Cost? UK Prices Explained

Typical UK boiler service prices

For a standard domestic gas combi or system boiler, most households in the South East pay somewhere in the region of £80 to £120 for an annual service. Central London tends to run higher, and rural areas slightly lower. The large national providers often bundle servicing into a monthly cover plan instead, which can look cheaper per month but usually costs more across a year than paying for a single visit.

Our rate is £99 for a boiler service or a gas safety certificate during normal working hours, 7:30am to 5pm. Evening appointments between 5pm and 7pm are £120, and Sundays or bank holidays are £220. All of those figures exclude VAT, and they cover up to two appliances, with £40 for each additional appliance beyond that.

What makes the price go up or down

• Time of day — an evening or weekend slot costs more because the engineer's time costs more, not because there is an emergency premium
• Number of appliances — a boiler plus a gas hob and a gas fire is more work than a boiler on its own
• Boiler type — oil and LPG boilers, back boilers and older floor-standing units usually take longer than a modern wall-hung combi
• Access — a boiler boxed into a fitted cupboard or sited in a loft adds time before any work starts
• Whether you combine it with a gas safety certificate, which is cheaper together (£160) than booking both separately
• Whether parts are needed — a service is labour only, and anything replaced is charged in addition

What you should actually get for the money

A proper service is not simply a visual once-over. The engineer should check the boiler casing, seals and flue, test gas pressure and burner combustion with an analyser, inspect the heat exchanger and condensate arrangement, test the safety devices and controls, and check system pressure and general operation before leaving.

You should also be told what was found. If your gas pressure is marginal, a seal is perishing, or the expansion vessel is losing its charge, that is exactly the sort of early warning a service exists to give you. A service that produces no conversation and no paperwork is worth questioning regardless of what it cost.

Service, gas safety certificate, or both?

These are different things and it is worth being clear which you are buying. A boiler service is a maintenance check aimed at keeping the appliance running efficiently and keeping your manufacturer warranty valid. A gas safety certificate, sometimes called a CP12, is a safety inspection of gas appliances and the record that landlords are legally required to hold and issue to tenants.

If you are a homeowner, an annual service is usually all you need. If you let the property, you need the certificate every twelve months, and combining it with a service at £160 is both cheaper and less disruptive than two separate appointments.

Is an annual service worth paying for?

On pure arithmetic, a £99 service against a £2,500 to £3,500 boiler replacement is straightforward insurance. But the more practical argument is warranty: most manufacturers will decline a warranty claim if you cannot show an unbroken annual service history, which turns a free repair into a chargeable one.

The second argument is timing. Boilers overwhelmingly fail in the first genuinely cold week of the year, when every heating engineer in Surrey is already booked. Servicing in late summer or early autumn catches worn components while there is still slack in the diary and while you are not without heating.

How we charge

We publish every rate rather than quoting per enquiry. There is no call-out charge, no emergency premium and no ULEZ surcharge on local work. Labour is charged as shown and any parts fitted are charged in addition, with the engineer telling you what a part costs before fitting it wherever possible.

All rates exclude VAT, which is added at the prevailing rate. WDI Group (Surrey) Ltd is VAT registered under number 495 8550 36, and our engineers are Gas Safe registered under registration 968274.