Price is usually the first thing people ask about when a boiler service is due. It’s a fair question — and one that deserves a straight answer rather than the vague ‘it depends’ that you often get from the trades industry.
In Kent, a standard boiler service from a Gas Safe registered engineer typically costs between £70 and £120. The variation comes down to a few factors: the company you use, the type of boiler, your location within the county, and whether you’re on a service plan or booking as a one-off.
At David Osborne Heating, we keep our servicing prices competitive and transparent. We cover Deal, Dover, Folkestone, Canterbury, Whitstable, Maidstone, and the wider East Kent area — so travel doesn’t inflate your bill if you’re within our patch.
What does a boiler service include?
A proper boiler service isn’t just someone turning up and ticking a box. A thorough service should include a visual inspection of the boiler casing and flue, checking the burner and heat exchanger, inspecting the gas pressure and flow, testing the ignition and controls, checking for signs of corrosion or leaks, and verifying that the boiler is operating safely within manufacturer specifications. You should receive a service record at the end — either a physical document or a digital certificate.
If a company is offering a ‘service’ for £40–£50, it’s worth asking exactly what’s included. A price that low usually means a quick visual check rather than a full internal inspection.
Service plans vs one-off bookings
Some boiler companies offer annual service plans — a monthly direct debit that covers your service and sometimes includes emergency call-out cover. These can make sense if you want predictable costs and don’t want to think about it each year. Typical plan costs range from £8 to £20 per month depending on what’s covered.
One-off bookings give you more flexibility, and for a well-maintained modern boiler with no history of issues, they’re often the more economical choice. The key is simply not to leave long gaps between services.
Does boiler age affect the cost?
Older boilers — particularly those over 10 years old — can sometimes take longer to service if parts are more complex to access, or if the engineer identifies issues that need addressing. This isn’t always the case, but it’s worth being aware that an older system may occasionally cost slightly more than a newer one.
If your boiler is over 12–15 years old, an engineer may also raise the question of whether servicing represents good value versus replacement. A new A-rated combi boiler can reduce your heating bills significantly, and the cost of installation often pays back over time through efficiency savings.
What’s not included in a standard service?
A boiler service covers inspection and cleaning of existing components. It doesn’t cover repairs or part replacements — those are additional costs if issues are found. Common additional costs include replacing a faulty pressure relief valve, reseating a gas valve, or resolving ignition faults. A good engineer will always explain what they’ve found and give you a quote before doing anything extra.
Frequently Asked Questions
Q: Is there VAT on boiler servicing?
A: Yes — VAT is charged at the standard rate of 20% on boiler servicing. Most reputable companies display prices inclusive of VAT, so always check whether a quote is ex-VAT.
Q: Can I claim boiler servicing as a tax deduction?
A: If you’re a landlord, boiler servicing costs are a legitimate allowable expense against rental income. Speak to your accountant for specific advice.
Q: How long does a boiler service take?
A: Usually between 45 minutes and an hour. If the engineer identifies issues that need attention, it may run slightly longer.
Q: Do I need to be home for the service?
A: Yes — the engineer needs access to the boiler and, in most cases, the gas meter. You or another responsible adult should be present throughout.
Q: Should I get more than one quote for a boiler service?
A: For a service, the price difference between reputable local engineers is rarely significant enough to make comparison shopping worthwhile. More important is checking that the company is Gas Safe registered and has a track record of good reviews locally.