What is on a CP12 certificate?

A CP12 certificate, otherwise known as a landlord’s gas safety certificate, is a legal requirement for all residential landlords in the UK. Landlords must ensure that every house they own is issued with a CP12 certificate every year.

A CP12 record documents the tests and checks landlords must undertake as outlined in the Gas Safety (Installation and Use) Regulations. Many of the checks on the CP12 certificate only require a visual inspection, and detailed inspections of flue lining, flue construction or flue integrity only take place when specifically recorded.

A CP12 certificate will record the following details:

Details of Registered Business

• Gas Safe Register number
• Name of registered engineer
• Gas Safe Register license number
• Engineer’s business
• Business address and postcode
• Engineer’s contact number
• Signature of record issuer
• Name of record issuer
• Signature of recipient
• Date of gas safety check
• When is the next safety check due?

Relevant parties’ details

• Address of the property in question
• Address of the landlord, homeowner or agent

Appliance details

• Number of gas appliances tested
• Location of appliances
• Type of appliances
• Appliance manufacturer
• Appliance model
• Owner of appliance
• Flue type
• Was the appliance inspected?

Inspection details

• Operating pressure
• Heat input
• Are the safety devices operational?
• Is the ventilation adequate?
• Results of visual inspection of flue and termination
• Results of flue operation tests
• Combustion analysis report
• Service status
• Is the appliance safe to use?
• Results of visual inspection of gas installation pipework
• Results of visual inspection of gas supply pipework
• Is the Emergency Control Valve adequately accessible?
• Results of gas tightness test
• Is the Protective Equipotential bonding adequate?

Defect details

• Were any defects identified?
• What is the Gas Industry unsafe situations procedure classification of this defect?
• What warning or advice record was given?
• What action was taken in regards to these defects?
• What work was undertaken?