How much does a gas safety certificate cost?

There's no fixed price for a gas safety certificate. As a rough guide, a single-appliance CP12 usually costs about £60 to £90, with the UK average around £80. What you actually pay depends on your region, how many appliances need checking, and whether it's bundled with other work. The ranges below are a starting point for comparing quotes, not a rate card.

What does a gas safety certificate typically cost?

Around £80 for a single appliance is the middle of the market, with most quotes landing somewhere between £60 and £90. Region moves the number more than anything else.

• UK average: around £80 for a single appliance.
• London and the South East: the dearest, roughly £85 to £120.
• Northern England and Scotland: cheaper, about £50 to £75.
• Each extra appliance: most engineers add around £10 to £15.

What affects the price of a gas safety check?

The number of gas appliances, fittings and flues is the biggest factor, because each one has to be checked individually and recorded on the CP12. A one-boiler flat is a quick visit; a house with a boiler, hob and gas fire is not. Beyond appliance count, the price moves with the region and local demand, whether the engineer charges a separate call-out fee, how easy the property is to get into, and the time of year. Winter is when engineers are busiest with breakdowns, so a routine check booked in December competes with no-heat emergencies for diary space, and some engineers price accordingly. Access matters too: a certificate that takes two failed appointments before the engineer gets in costs somebody that wasted time, and repeat no-access visits often carry a charge.

Can you bring the cost down?

Yes, mainly by bundling and grouping. A gas safety check booked alongside a boiler service usually works out cheaper than two separate visits, because the engineer is already there with the panels off. Landlords with several properties in the same area can often negotiate a per-property rate for doing them in one run, and letting agents do exactly this across their portfolios. Booking in the quieter months rather than mid-winter helps too. And the early-renewal window works in your favour: the check can be done up to two months before the due date, any time from 10 months after the last one, without moving your renewal anniversary, so you can shop around calmly instead of paying whatever the only available engineer charges in a panic.

Is the cheapest quote the best one?

Not automatically. The certificate is only worth anything if the check behind it was done properly, and a proper check takes time: gas tightness, burner pressure or heat input against the data plate, flue performance, ventilation and safety devices, on every appliance. A price that only works if the engineer is in and out in ten minutes is telling you something. Before you book anyone, check they're on the Gas Safe Register, which you can do free on the Register's website, and ask what the visit includes. A fair price for a thorough check is cheaper than a bargain for a rushed one, because the rushed one leaves you holding a record for a check that didn't really happen.

What are you actually paying for?

An engineer's qualified time, and the record at the end of it. The price also has to carry the engineer's costs: Gas Safe registration, ACS reassessments every five years, insurance, a calibrated analyser, fuel and the van. That's why prices below the local norm are rare and worth questioning. What you should get for your money is a competent check and a legible CP12 delivered promptly, with a copy for your tenant within 28 days. Engineers who run their paperwork through Manifold produce the record on their phone at the job and send it over in minutes, and if you ever lose your copy it's findable in seconds rather than a week of phone tag, which is worth bearing in mind when two quotes are otherwise level.