Glossary

Gas safety certificate (CP12)

Plain-English definition

Annual safety check landlords must arrange for any gas appliance in your home, carried out by a Gas Safe registered engineer. You must be given a copy within 28 days. Missing or expired CP12 can void Section 21 and is itself a serious breach.

Related terms

Section 11

Section 11 of the Landlord and Tenant Act 1985. Places a duty on landlords of properties let for less than 7 years to keep the structure and exterior in repair, and the installations for water, gas, electricity, sanitation and heating in working order.

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By: Support for Tenants editorial team

Last updated: 15 June 2026

Reviewed against current housing law for England and Wales as at 15 June 2026. Checked by our SRA-regulated panel solicitors. This is general information, not legal advice for your specific case. Any compensation figures or ranges shown are illustrative only and not guaranteed; every case is different.

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