Landlord Gas Safety Certificate Requirements UK 2026, Annual Check Rules, Penalties & Deadlines

What is a gas safety certificate (CP12)?

A CP12 is the common term for the Gas Safety Record produced after an annual gas safety inspection. CP12 refers to the form number historically used by Corgi (now Gas Safe). The official document is the Landlord Gas Safety Record (LGSR). It records:

• The address of the property and each appliance inspected
• The date of inspection and the next due date
• Any defects identified and whether the appliance has been left in a safe condition
• The engineer's name, signature, and Gas Safe registration number
• Whether any appliances were condemned (immediately dangerous) or at risk

Which properties require an annual gas safety check?

The requirement applies to all domestic gas appliances and flues in a property that is let under a tenancy. This includes:

• Gas boilers and central heating systems
• Gas fires (including decorative gas fires)
• Gas cookers and hobs (where supplied by the landlord as part of the tenancy)
• Gas water heaters
• Any other gas appliance provided by the landlord
• Flues and chimneys serving any of the above
• Excluded: Appliances owned by the tenant (not provided by the landlord), although the landlord must still ensure the connecting pipework is safe

The 28-day rule, serving the gas safety record

After each annual check, the landlord must provide a copy of the gas safety record to existing tenants within 28 days of the check. For new tenants, the record must be provided before or at the start of the tenancy.

• Provide the record directly to the tenant, email is acceptable provided the tenant has agreed to receive documents electronically
• Keep a copy of every gas safety record for at least 2 years
• At the start of a new tenancy, hand over the most recent gas safety record with the tenancy documents
• The record must be provided before the tenant moves in, it cannot be given after the tenancy commences
• For HMOs, provide the record to each household / room where the appliance serves that room

The 2-month early renewal rule

Under Regulation 36(3)(c) of the Gas Safety Regulations, a landlord can arrange a gas safety check up to 2 months before the anniversary date of the previous check, without losing the 12-month anniversary cycle. This means:

• If your current CP12 is dated 15 June 2025, you can renew as early as 15 April 2026 and the new certificate will run until 15 June 2026
• This gives a practical 10-month booking window per year
• If you renew more than 2 months early, the new 12-month cycle starts from the new inspection date, effectively shortening your annual cycle
• Do not leave renewals to the last day, engineers are booked up and a lapse in cover is a criminal offence from day one

Consequences of non-compliance

The consequences of failing to maintain a current gas safety record are severe and operate across three separate legal regimes:

• Criminal liability: Failure to carry out or record the annual check is a criminal offence under Regulation 36 of the Gas Safety Regulations, unlimited fine and/or up to 6 months' imprisonment
• Litigation exposure: A tenant injured by an unsafe appliance can bring a civil claim, and evidence of a lapsed certificate can be raised against the landlord in any dispute, including as part of a disrepair counterclaim in possession proceedings
• Insurance void: Most landlord building and contents insurance policies require gas safety compliance. A lapsed certificate may void the policy
• Licensing jeopardy: Non-compliance with gas safety can result in revocation of an HMO or selective licence

Gas safety and the Renters' Rights Act 2025, what changed in May 2026

The Renters' Rights Act 2025 (which commenced 1 May 2026) abolished Section 21 no-fault evictions and made Section 8 the sole possession route for private landlords in England. Gas safety duties themselves did not change, but it is worth being clear about what the Act does and does not do:

• Section 21 is gone: Landlords in England can no longer rely on the no-fault Section 21 route. From 1 May 2026, only Section 8 grounds apply.
• Gas safety does not affect Section 8 validity: A missing or lapsed gas safety record does not invalidate a Section 8 notice. The Act's possession restrictions relate to unprotected tenancy deposits and, once the duty is in force, registration on the Private Rented Sector Database, and neither restriction applies where possession is sought on anti-social behaviour grounds.
• Non-compliance still carries its own penalties: Failing to arrange the annual check or serve the record remains a criminal offence under the Gas Safety Regulations, with an unlimited fine and up to 6 months' imprisonment.
• It can still hurt you in court: A tenant can raise safety failures in a disrepair counterclaim during possession proceedings, and non-compliance can jeopardise an HMO or selective licence.
• Action: Keep the CP12 current and serve it on time regardless of any possession plans. It is a standalone legal duty, not a possession formality.

Gas safety checks and possession proceedings

A common misconception is that a lapsed gas safety certificate blocks a Section 8 possession notice. It does not. The position is:

• A Section 8 notice is not invalidated by gas safety non-compliance, the compliance regime and the possession regime are separate
• The Renters' Rights Act 2025 restricts possession where a tenancy deposit is unprotected and, once the duty is live, where the landlord is not registered on the Private Rented Sector Database (neither restriction applies to anti-social behaviour grounds)
• Gas safety non-compliance is enforced separately, criminal prosecution, unlimited fine, and up to 6 months' imprisonment
• A tenant can still raise safety failures as part of a disrepair counterclaim in possession proceedings, which can delay or reduce the outcome
• Best practice: keep all compliance documents current before serving any possession notice, it removes ammunition for counterclaims and protects your licence position

Frequently asked questions