Gas safety records

What is a CP12?

A CP12, now officially the Landlord Gas Safety Record, is the document a Gas Safe registered engineer issues after the annual gas safety check on a rented property's gas appliances, fittings and flues. UK landlords must have one for every let property, renew it every 12 months, and give tenants a copy.

“CP12” is the old form code that stuck. The document is now officially called the Landlord Gas Safety Record, but almost everyone in the trade still calls it a CP12, and landlords often call it a “gas safety certificate”. They all mean the same thing: the record of an annual gas safety check on a rented property.

What a CP12 covers

During the check, a Gas Safe registered engineer inspects every gas appliance, fitting and flue that the landlord is responsible for, and records the results. A CP12 typically lists:

Each appliance and flue checked, with make, model and location
Whether each one passed, and any defects found
Safety checks: gas tightness, burner pressure or heat input, flue performance, ventilation and safety devices
The date of the check and the next check due date
The engineer's name, Gas Safe licence number and signature

Who needs one

Landlords letting a property with gas appliances have a legal duty under the Gas Safety (Installation and Use) Regulations 1998 to have this check done every 12 months. Homeowners aren't legally required to, though many arrange the same check for peace of mind (sometimes recorded on a homeowner gas safety record).

A CP12 is only valid when it's issued by a Gas Safe registered engineer after an in-person check. No template or app can produce a valid record on its own; the check and the engineer's registration are what make it count.

Frequently asked

Is a CP12 the same as a gas safety certificate?

Yes. “Gas safety certificate” is the everyday name for the Landlord Gas Safety Record, historically the CP12 form. Technically it's a record of a check rather than a certificate, but the terms are used interchangeably for the same document.

How long does a CP12 last?

Twelve months from the date of the check. You can have the next check done up to two months early and keep the original expiry date, so your annual cycle doesn't drift.

Do I get a CP12 as a homeowner?

You can. Homeowners aren't legally required to have an annual gas safety check, but you can arrange one and receive a record of it, useful when selling, or simply for reassurance that your appliances are safe.

Sources

Last reviewed July 2026. This guide is general information, not legal or safety advice, gas safety work must be carried out by an appropriately Gas Safe registered engineer. Rules can change, so check the linked official sources for the current position.

Spend less of your evening on this.

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