Gas Safety Certificate for Landlords: UK Requirements

Quick Answer

Landlords letting a property with gas appliances must arrange an annual gas safety check by a Gas Safe registered engineer and provide tenants with a copy of the certificate, sometimes called a CP12, within 28 days of the inspection. New tenants must receive a valid certificate before they move in. Failure to comply is a criminal offence with fines up to £6,000 and potential imprisonment.

What the Law Requires

Under the Gas Safety (Installation and Use) Regulations 1998, landlords must:

Arrange an annual gas safety check on every gas appliance, flue, and piece of pipework
Use only a Gas Safe registered engineer, since using an unregistered engineer is itself a criminal offence
Keep a copy of every gas safety record for at least two years
Provide existing tenants with a copy within 28 days of the check
Give new tenants a valid certificate before they move in

How to Check an Engineer Is Registered

Only a Gas Safe registered engineer can legally carry out a landlord gas safety check. You can verify registration at gassaferegister.co.uk using the engineer’s name or registration number. Every registered engineer also carries an ID card showing their photo, registration number, and the specific categories of gas work they are qualified for, such as boilers, gas fires, or cookers. Always ask to see this card before work begins.

What Happens During the Check

The engineer inspects and tests every gas appliance and associated flue and pipework in the property. This includes boilers, gas fires, cookers, and any other gas-powered equipment. They check for correct operation, adequate ventilation, safe flue operation, and any signs of leaks or damage. Once complete, they issue the gas safety record detailing what was checked, any faults found, and any remedial work carried out.

What Happens If You Don’t Comply

Non-compliance is a criminal offence carrying fines of up to £6,000 per breach and, in serious cases, imprisonment. Beyond the direct penalty, non-compliance creates several other risks:

Most landlord insurance policies require a valid gas safety certificate, so a lapse can void your cover
If a tenant is injured due to a faulty gas appliance, you face personal injury claims and potential civil liability
Under the Renters’ Rights Act 2025, gas safety compliance is now directly tied to a landlord’s ability to regain possession of a property, making non-compliance far more costly in practical terms
In the most serious cases, where gas safety failures cause death, landlords have faced manslaughter prosecutions

Carbon monoxide poisoning still causes around 50 deaths in the UK each year, which is the core reason these rules are enforced so strictly.

Gas Safety and Your Wider Compliance Calendar

Gas safety compliance works best when scheduled alongside your other landlord duties rather than treated separately. Since gas safety renews annually while an EICR renews every five years, many landlords book their gas check at the same time each year and align their EICR renewal to fall on a matching date where possible, reducing the number of separate appointments tenants need to accommodate. See our EICR checklist for landlords for how to build a combined compliance calendar.

What Tenants Should Know

Tenants should receive a copy of the current gas safety certificate at the start of their tenancy and each year afterward. If a certificate is not provided, tenants should request it in writing first. If a landlord still does not respond, the matter can be reported to the local council.

Frequently Asked Questions

How often do landlords need a gas safety certificate?
Every 12 months, carried out by a Gas Safe registered engineer.

What happens if my landlord has no gas safety certificate?
This is a criminal offence on the landlord’s part, and tenants can report it to the local council after requesting the certificate in writing.

How much does a gas safety certificate cost?
Prices vary by location and the number of appliances, and many landlords take out cover that includes it as part of a wider maintenance package.

How long is a gas safety certificate valid?
12 months from the date of inspection.

Does gas safety compliance affect my ability to evict a tenant?
Under the Renters’ Rights Act 2025, gas safety compliance is now directly linked to a landlord’s ability to regain possession of a property, making it more important than ever to stay current.