Gas Safety Certificates (CP12): What UK Landlords Must Know in 2026

In 2026, most landlords still say “gas safety certificate” or “CP12”. The legal requirement is the same thing in practice: a clear record that a safety check has been completed on the landlord’s in-scope gas appliances and flues, by the right person, on the right schedule.
Key takeaways
  • A “CP12” is the everyday name for the Landlord Gas Safety Record, required under Regulation 36.
  • Checks must happen at intervals of no more than 12 months, carried out by a Gas Safe registered engineer.
  • You can carry out the annual check-up up to 2 months early and keep the same deadline date, if you follow the rules.
  • You must give tenants the latest record within 28 days, and before move-in for new tenants. Electronic delivery is allowed if the tenant can access it.
  • Keep records until two further checks have been completed (often longer than “two years”), and don’t hold back the record while remedials are outstanding.

CP12 vs “Landlord Gas Safety Record”: what it actually means

The Health and Safety Executive refers to the record as the Landlord Gas Safety Record, and notes it was “previously referred to as a gas safety record, certificate or CP12 form”.
One small but useful point: Gas Safe Register doesn’t issue a standard CP12 form. You can use a bought-in template or design your own, as long as it includes the required information and is completed by the engineer during the check.

What properties and appliances does a CP12 cover?

For Great Britain (England, Scotland, Wales), landlord duties are set out in Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998.
The regulation covers “relevant gas fittings”, which include:
  • landlord-provided gas appliances in the premises (with limited exceptions)
  • installation pipework in the premises
  • gas appliances/pipework that serve the premises directly or indirectly and are owned or controlled by the landlord
That “directly or indirectly” line is why communal systems matter in social housing. If it serves the home and is under landlord control, it belongs in the programme.
Northern Ireland note: NI follows separate legislation, the Gas Safety (Installation and Use) Regulations (Northern Ireland) 2004. You need to read the supporting guidance from HSENI to get the specific differences.

Who can issue a gas safety certificate?

In plain terms, the annual check must be carried out by a Gas Safe registered engineer, and the record needs their details. Gas Safe’s own landlord summary covers the expectations and the output you should receive.
If you need a quick resident-friendly reference, Gas Safe provides this brochure which also states landlords must arrange a yearly check and provide the record before move-in and within 28 days of the annual check.

How often does it need renewing in 2026?

The rule that trips people up is the wording: it’s not “every calendar year”. Regulation 36 requires checks at intervals of not more than 12 months since the last check.

The 2-month “MOT-style” window

You can carry out the annual check up to 2 months before the due date and still keep the original deadline date.
The legal mechanism is Regulation 36A, which treats the early check as if it happened on the deadline date for scheduling purposes.
For social landlords, this window is the difference between steady compliance and last-minute scrambles when access fails.

What must be on the CP12 (Landlord Gas Safety Record)?

You can keep the layout simple, but the content has to be there. As a minimum you need details such as:
  • property address
  • landlord (or agent) name and address
  • description and location of each appliance/flue checked
  • date of the check
  • engineer name, registration number and signature
  • safety defects identified and remedial action taken
  • confirmation that the check covers the relevant matters in the regulations

When do you have to give tenants a copy?

The deadlines are as follows:
  • Existing tenants: within 28 days of the record being completed
  • New tenants: before they move in
If the tenant is happy and can access it, you can provide it electronically.

How long do you keep the record?

Regulation 36 requires the record to be kept until two further checks have been carried out, or (where an appliance/flue is removed) for 2 years from the last check.

Don’t delay the record because remedials are needed

This is a common mistake: treating the certificate as “done” only once follow-on work is complete.
The record should be issued on completion of the checks and not delayed, even if concerns are found, and remedial work is still needed. The record should be considered a “living document” that should be supplemented with follow-up actions.

Practical tips for social landlords (where compliance usually slips)

  1. Use the 2-month window as standard for higher-risk access cases, not as a rescue plan.
  2. Treat the communal utilities as first-class stock data. If it serves the premises and sits under landlord control, it needs the same evidence trail.
  3. Build record delivery into the workflow. If the record isn’t issued within 28 days, you’ve created avoidable exposure.
  4. Keep the evidence clean. The record is the anchor, but follow-up notes and remedial completion matter because the record is meant to be supplemented.
If you’re interested in learning how software can help eliminate a lot of the challenges around admin and timing, check out True Compliance’s Gas Safety Compliance page.
Table of Contents
Landlord Electrical Safety Responsibilities Under the 2020 Regulations
If you’re looking to learn more about landlord electrical safety responsibilities in the UK, it’s worth clearing one thing up early: the 2020 Electrical Safety...
How the Fire Safety Act 2021 Affects Building Owners and Managers
If you’re working towards Fire Safety Act 2021 compliance in the UK, there is an easy detail to miss: the Act doesn’t actually replace existing...
Water Safety Compliance Testing What You Need to Know
Water testing is one of the most misunderstood parts of compliance. Some teams over-test and still miss control failures. Others avoid testing entirely and hope...