How Often Do Landlords Need a Gas Safety Check?

Every 12 months, without exception — that’s the rule for landlord gas safety checks in the UK, for as long as a property with gas appliances is let. The detail people usually get tripped up on isn’t the frequency, it’s the timing rules around renewing early and what happens if a check lapses.

The basic rule

If you let a property with any gas appliance — a boiler, gas hob, or gas fire — you must have it inspected by a Gas Safe registered engineer every 12 months, and give tenants a copy of the current certificate. This applies for the entire time the property is let with gas appliances present, not just at the start of a tenancy.

The “2 months early” rule that actually helps you

You don’t have to book the check on the exact expiry date each year. If you have the inspection done any time in the 2 months before the current certificate expires, the new certificate’s 12-month validity is calculated from the original expiry date, not the date of the new check.

Example: if your current certificate expires 15 October, and you book the next check on 1 September (within the 2-month window), the new certificate is still valid until 15 October the following year — not 1 September. This means you can build in a sensible early-autumn slot every year (avoiding the busy pre-winter rush) without losing time, and without your renewal date slowly drifting later each year.

What if the certificate has already lapsed?

Book an inspection immediately. The property is technically non-compliant from the moment the previous certificate expired, regardless of whether anything has actually gone wrong — this exposes you to the same fines and legal risk as never having had one. Don’t wait for a scheduled renewal or a tenancy changeover; treat it as urgent.

Does a new tenant reset the clock?

No. A change of tenant doesn’t require a fresh inspection on its own — the 12-month cycle continues from your last check date. What you must do is give the new tenant a copy of the current valid certificate before they move in.

What if you’ve just bought a rental property?

If you’ve taken over a property that’s already tenanted, check the previous owner’s paperwork for the existing certificate’s expiry date — the 12-month cycle typically continues from that date rather than resetting when ownership changes. If you can’t get hold of the previous certificate, or you’re not confident it’s genuine and up to date, it’s sensible to arrange a fresh inspection straight away rather than assume everything is in order.

Managing multiple properties

If you have several rental properties, it’s worth tracking certificate expiry dates in one place (a simple spreadsheet works fine) rather than relying on memory across multiple addresses. Staggering renewal dates across the year, rather than letting several properties come due in the same month, also makes it easier to book appointments at a time that suits you rather than everything landing in the same busy week.

Keeping on top of it

The most reliable approach is to pick a fixed month each year (using the 2-months-early window to avoid awkward scheduling clashes) and book it as a standing annual reminder, rather than trying to remember an exact date. If you manage several rental properties, staggering them across different months spreads the workload rather than everything landing at once.

For the full picture on what the inspection actually covers, see what is a CP12 certificate. We carry out annual gas safety inspections for landlords across Norwich and the surrounding area — get in touch to book yours in, or to check when your current certificate is due.