Gas Safety Certificate (CP12) explained

Also known in the trade as a CP12, a Gas Safety Certificate is a report which outlines the appliances tested in an annual gas safety check.

A legal requirement in the UK, all landlords and owners of commercial premises need to have their gas appliances regularly serviced to make sure they are working efficiently and safely.

Gas Safety Certificates are valid for a period of 12 months and must be renewed.

What does an annual gas safety check involve?

Once a year you will need to arrange for a Gas Safe registered engineer to visit your property or commercial premises. They will carry out an inspection to ensure your gas fittings and appliances are safe to use.

With your permission they will:

  • Check that appliances are well ventilated and that there is a constant supply of fresh air enabling the gas to burn properly
  • Confirm that all safety devices are working effectively
  • Inspect the flue or chimney to make sure all fumes leave the property via the appropriate means
  • Declare an appliance unsafe if they find any faults

What does a Gas Safety Certificate say?

After a Gas Safe registered engineer has visited your property and completed your annual service they will document the following:

  • The date
  • The address of your property
  • A description and location of each appliance and flue checked
  • The faults and defects identified and any action required or taken to fix them
  • The results of operational safety checks carried out on the appliances
  • The name and registration number of the engineer who conducted your check
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