Gas Safety Certificate Cost
Real 2026 prices, what changes them, and the things a certificate is not.
The honest range
For a single boiler, £60 to £90 across most of the UK, with London at the top of that band and Greater Manchester nearer the bottom. Each additional appliance, gas hob, gas fire, second boiler, typically adds £15 to £25 rather than doubling anything. Ours is £79 for one appliance, fixed.
What legitimately changes the price
Number of gas appliances, whether the meter and emergency control valve are accessible, and travel to the property. What should not change it is how urgently you need it, and a firm that prices an inspection by your deadline is telling you something useful about how they price everything else.
Landlords: it is not optional
Under the Gas Safety (Installation and Use) Regulations 1998, every gas appliance in a let property must be checked annually by a Gas Safe registered engineer. The tenant gets a copy within 28 days, a new tenant gets one at the start, and in England a missing record also blocks a Section 21 notice. Records are kept two years.
A CP12 is an inspection, not a service
This is the most common and most expensive misunderstanding. The safety check confirms the appliance is safe right now, gas tightness, burner pressure, ventilation, flue. It does not clean the appliance or extend its life. A service does. Many manufacturer warranties require the service, not the certificate, and bundling both usually costs less than buying them separately.
What a failure means
An engineer who finds a dangerous appliance classifies it, At Risk or Immediately Dangerous, and, with your permission, disconnects it. That is not the engineer being difficult; leaving a known dangerous appliance connected is not something a registered engineer may lawfully do. The certificate is issued for the appliances that pass.
Check the engineer, not the paperwork
Every CP12 carries the engineer's Gas Safe licence number. It takes thirty seconds to check it at gassaferegister.co.uk, and it confirms both that they are registered and that they hold the specific qualification for the appliance type. A certificate from an unregistered fitter is worth nothing to you, to your tenant or to your insurer.
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