Gas Safety Certificates: A Landlord's Guide to the Annual Check

Of all the compliance certificates a landlord has to manage, the gas safety certificate is the one with zero tolerance for being late. Miss it and you are not just risking a fine, you can lose your ability to evict a tenant through the standard route and end up personally liable if something goes wrong with a gas appliance. Here is what the check actually involves and how to stay on top of it.

What a Gas Safety Certificate Actually Checks

Often called a CP12, the certificate is issued after a Gas Safe registered engineer inspects every gas appliance, flue, and pipework installed in the property. This covers boilers, gas fires, gas hobs and cookers, and any gas heaters. The engineer checks for gas tightness, correct ventilation, safe operation, and satisfactory flue performance, and issues a certificate confirming everything is safe or lists what needs fixing before it can be signed off.

Only an engineer on the Gas Safe Register can legally carry out the check. Always ask to see their ID card and confirm the categories on it match the appliances in the property, since registration is appliance specific.

How Often You Need One

The check must be carried out every 12 months for any rental property with gas appliances. You can renew up to two months before the current certificate expires without losing any time, since the new certificate's 12 month clock starts from the original expiry date, not the day of the new check.

Giving Tenants a Copy

You must give existing tenants a copy of the certificate within 28 days of the check. New tenants must be given a copy before they move in. Keep proof that you provided it, an email with a read receipt or a signed acknowledgement is safer than assuming a paper copy handed over in person will not get lost.

What It Costs

The average cost for a standard property with one boiler and one other gas appliance sits around £80, though it ranges from roughly £60 to £90 depending on where you are. London and the South East tend to run higher, often £85 to £120, while parts of the North and Scotland average £50 to £75. If you have several appliances, expect an extra £10 to £15 each. Many engineers bundle a boiler service with the CP12 for £110 to £140, which is usually cheaper than booking them separately.

What Happens If You Let It Lapse

An expired gas safety certificate is a criminal offence under the Gas Safety (Installation and Use) Regulations 1998, and local authorities and the Health and Safety Executive can prosecute. Beyond the legal risk, a lapsed certificate can block you from serving a valid Section 21 notice in England, meaning you cannot regain possession of the property through the standard route until you put it right. If a tenant is injured from a gas fault on an unchecked appliance, the liability sits with you.

Managing More Than One Property

A single certificate is manageable in your head. A portfolio of five or ten properties, each with its own expiry date scattered through the calendar, is where dates get missed. Orlo reads the certificate for you, works out the expiry date from the issue date if none is printed, and reminds you 6 weeks, 2 weeks, and 3 days before it is due, with each property kept in its own workspace so nothing from one address gets mixed up with another.