The short version
- Required annually for every gas appliance and flue in a let property
- A copy must reach the tenant, and new tenants at the start of the tenancy
- Records must be kept for two years
- A CP12 checks safety; it does not maintain the appliance
What the inspection covers
Every gas appliance in the property, plus the pipework and flues serving them.
- Appliance operating pressure and heat input
- Safety device operation
- Flue and combustion performance checks
- Ventilation adequacy for each appliance
- Gas tightness test on the installation
- Visual inspection of accessible pipework
Where landlords get caught out
The three recurring issues are appliances the landlord forgot about (a gas fire in a back room), access problems where the tenant can't be reached, and letting the certificate lapse between tenancies. Booking the next inspection at the same point each year removes most of the risk.
Managing a portfolio
For multiple properties we schedule inspections together, issue digital certificates and can combine CP12 with the annual boiler service in one visit — which is cheaper and means the appliance is actually maintained, not just tested.
Common questions
Is a CP12 the same as a boiler service?+
No. A CP12 records safety. A service maintains the appliance. Many landlords book both together.
What if the tenant won't give access?+
Document each attempt in writing. We can work with you on appointment times to make access easier.
Do I need one for an empty property?+
You need a valid certificate before a new tenancy begins, so it's usually done before letting.
How quickly do I get the certificate?+
We issue a digital certificate, usually the same day.
Book your CP12 inspection
Single properties or full portfolios — digital certificates issued same day.