Gas Safety Certificates for Landlords: Dates, Records and Renewal Requirements Explained
Published: 28 September 2026 · Last checked against source: 28 September 2026 · Reading time: 9 minutes
Most guides reduce gas safety to one instruction: get a CP12 every 12 months. The law asks landlords to know which appliances are covered, when each check falls due, when tenants received the record, and what happened to any fault the engineer found. This guide is for landlords in England; the regulations also apply in Wales and Scotland, while Northern Ireland has separate rules.
What is a CP12 landlord gas safety certificate?
CP12 is an older informal name. The law requires a record of each safety check, commonly called a landlord gas safety record. There is no mandatory printed form; the record must contain the required information.
What does the landlord gas safety check cover?
The duty covers gas appliances and flues provided by the landlord for the tenant's use, including portable and communal equipment. A tenant is generally responsible for their own appliance, while the landlord remains responsible for installation pipework. A property with gas pipework but no landlord-provided appliance or flue does not need an annual appliance check, but the pipework must remain safe. Only a Gas Safe registered engineer qualified for the appliance can carry out the check.
How long does a gas safety certificate last?
A covered appliance or flue must be checked within 12 months of installation and at intervals of no more than 12 months. Before a new tenancy, it must have been checked in the preceding 12 months. The next deadline is not always 12 months after the latest visit because the two-month early-check rule can preserve the previous deadline.
Can I renew a gas safety certificate two months early?
Yes. A check completed within the two months ending on its deadline is treated for scheduling purposes as though it happened on that deadline. If the deadline is 30 November 2026 and the engineer visits on 10 October 2026, the next deadline is 30 November 2027. A check on 10 August 2026 falls outside that window and moves the next deadline to 10 August 2027. A separate one-off alignment extension for an appliance or flue is not a general grace period. Read regulation 36A.
What must appear on the landlord gas safety record?
The record identifies the check date, property, landlord or agent, appliances and flues, defects, remedial action, confirmation of examination, and the engineer's name, signature and Gas Safe registration number. Electronic records are acceptable when they meet HSE's conditions.
When must tenants receive a gas safety record?
Existing tenants must get a copy within 28 days of the check; new tenants must receive the latest record before moving in. Limited display exceptions apply. Electronic delivery is possible when the tenant agrees and can access the record; supply paper when requested. Keep proof of delivery as good practice.
How long must landlords keep gas safety certificates?
Keep a record until two further checks of that appliance or flue have been carried out. For a removed appliance or flue, keep its last record for two years from its last check. This can mean longer than two calendar years. Read regulation 36.
What if the engineer finds a fault?
Issue the record after the check even if faults were found. Arrange prompt remedial action, do not use an unsafe appliance, and keep evidence of repairs.
Is a boiler service the same as a gas safety certificate?
No. Maintenance and the annual safety check are separate duties. A service does not necessarily cover all safety-check points, nor does a safety check necessarily meet maintenance needs.
What if a tenant refuses access for a gas safety check?
Do not force entry. Make reasonable, documented attempts to arrange the visit; there is no universal number of attempts that discharges the duty. Read HSE's tenant access guidance.
What happens if the gas safety certificate expiry date passes?
There is no general grace period. Book a qualified engineer promptly, record the true check date, and retain evidence of attempts to comply. A late check does not erase the earlier gap. Read our expired-record guide.
Other lettings and responsibility for checks
Special rules may apply to long leases, holiday lets and sublets. Where an agent arranges checks, the contract should allocate responsibility clearly.
Keep the whole record chain together
Keep the appliance and check dates, previous and next deadlines, tenant delivery evidence, defects and repair evidence in one place. Check certificate dates or set reminders.
This article is general information about landlord gas safety administration in England, not legal advice.