CertBox
Gas Engineers Create in CertBox

Gas Safety Record (CP12)

A CP12 certificate — officially called a Landlord Gas Safety Record — is the legal document confirming that all gas appliances, fittings, and flues in a rental property have been checked by a Gas Safe registered engineer. Every landlord in the UK must have a valid CP12 for each rental property, renewed annually.

Gas Safety (Installation and Use) Regulations 1998, Regulation 36Valid: Annual (12 months)

What it covers

  • Gas meter and emergency control valve check
  • Visual inspection of pipework
  • Safety checks on every gas appliance (boilers, cookers, fires)
  • Flue integrity and ventilation assessment
  • Tightness test on the gas installation
  • Confirmation each appliance is safe to use or classified as At Risk / Immediately Dangerous

Who needs a CP12?

Private landlords
Social housing providers
Letting agents
Property managers

Create your CP12 with CertBox

1

Fill in the form

Pick CP12 from the list, fill in the fields on your phone.

2

Compliance checks run

Built-in validation catches missing fields and out-of-range readings.

3

PDF generated instantly

Professional PDF ready to share via secure link or download.

Frequently asked questions about CP12

How long is a CP12 valid for?
A CP12 is valid for 12 months from the date of the check. Landlords must arrange the next check before it expires. You can carry out the renewal up to two months early without losing the expiry date.
Who can issue a CP12?
Only a Gas Safe registered engineer can carry out a landlord gas safety check and issue a CP12. The engineer must hold the correct ACS qualifications for the appliances being tested.
What happens if an appliance fails?
The engineer must classify it as At Risk (AR) or Immediately Dangerous (ID), attach a warning notice to the appliance, and record the classification on the CP12. ID appliances must be disconnected immediately.
Do tenants need a copy of the CP12?
Yes. The landlord must give a copy of the CP12 to existing tenants within 28 days of the check, and to new tenants before they move in. CertBox lets you share it via a secure link instantly.
Can I issue a digital CP12?
Yes. There is no legal requirement for a CP12 to be on paper. A digital PDF is fully compliant as long as it contains all the required information. Most letting agents now prefer digital certificates.

Related certificates

Gas Engineers

Gas Service Record

Create gas service records from your phone. Covers FAGS checks, BS 7967 combustion analysis, pressure readings.

Gas Engineers

Powerflush Certificate

Create BS 7593:2019 compliant powerflush certificates from your phone. Water quality testing, magnetic filter check, inhibitor dosage.

Gas Engineers

Chimney Sweep Certificate

Create chimney sweeping certificates from your phone. Flue condition assessment, smoke draw test, CO alarm check. For accredited chimney sweeps.

Ready to create your CP12?

Free for individual tradesmen. Set up in 30 seconds, no card required.