What is a landlord gas safety certificate?
A landlord gas safety certificate (commonly called a CP12) is the written record an engineer produces after checking that every gas appliance, flue and gas fitting in a rental property is safe. Landlords are legally required to have a valid certificate and to provide a copy to their tenant within 28 days of the inspection.
How much does a gas safety certificate cost in Peterborough?
Our gas safety certificates start from £60 + VAT for a 1–2 bedroom property with one gas appliance. The price increases with property size and the number of appliances (boiler, hob, fire, etc.). See our Prices page for current rates, and our gas safety certificate service page for full details.
What does the engineer check?
During a CP12, a Gas Safe registered engineer inspects each gas appliance to confirm it is operating safely. This includes checking gas pressure, combustion, flues and ventilation, and testing for leaks. The engineer then issues a written record listing each appliance, its result, and any defects or advisories.
How often is a gas safety certificate required?
A valid certificate is required every 12 months. The certificate must be renewed before the previous one expires so there is no gap in cover. Landlords should also give a copy to new tenants at the start of a tenancy and to existing tenants within 28 days of each annual check.
What happens if a fault is found?
If an appliance fails the check, the engineer will mark it as "Not to Current Standard" or "At Risk" and disconnect it if there is an immediate danger. The fault must be repaired by a Gas Safe registered engineer and the appliance re-checked before it can be used again. We can carry out gas repairs across Peterborough as part of the same visit.
Booking your gas safety certificate
We offer same-week CP12 appointments across Peterborough and all PE postcodes. To book, call or WhatsApp us and we will arrange a convenient time. You can also use our Landlord Compliance Checker to see whether your other certificates (EICR, alarms, EPC) are also due.
Reviewed on 3 October 2026. This is general information, not legal advice.