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A CP12 is the landlord gas safety record: the record of the annual gas safety check on each landlord-provided gas appliance and flue. NexCert lets Gas Safe engineers complete it on site and deliver it with an audit trail. What a CP12 is and who gets a copy.
CP12 is the trade name for the Landlord Gas Safety Record required under the Gas Safety (Installation and Use) Regulations 1998 (GSIUR). It records the results of the annual safety check on every gas appliance, flue and piece of pipework the landlord is responsible for at a let property. It is not itself a defined legal term — GSIUR requires the check and the record, and "CP12" is the industry's own name for the document, not the regulation's — but it is what engineers, letting agents and landlords all actually call it, so that's the term used here.
This describes the regulation as public law. Whether a specific installation, appliance or tenancy is compliant is a decision for the Gas Safe registered engineer carrying out the check, not something this page can determine for a specific property.
NexCert issues the CP12 (Landlord Gas Safety Record) alongside the other four gas certificate types it ships under GSIUR 1998: CP14 (Warning/Advice Notice for an Immediately Dangerous or At Risk finding), CP2 (Domestic Gas Service Record, not statutory but commonly required for insurance or warranty), CP17 (Commercial Gas Installation Safety Report, including tightness testing and purging) and CP42 (Commercial Catering Gas Safety Certificate). The engineer completes the check and the record on a phone or tablet on site, offline if needed, and the finished record is delivered to the landlord or managing agent with an evidence trail — useful when a tenant, letting agent or local authority asks for proof a check happened and when. See the full certificate catalogue for all five gas certificate types.
There are fields for your own Gas Safe registration number, at both company and individual engineer level, on every certificate NexCert issues.
Where a check finds an installation Immediately Dangerous (ID) or At Risk (AR), that's recorded on a CP14 Warning/Advice Notice rather than on the CP12 itself. NexCert issues CP14 from the same workspace, so a CP12 visit that turns up a fault doesn't need a separate tool.
A single CP12 is one annual check on one property. A letting agent or housing provider managing dozens or hundreds of tenancies has a different problem: knowing which properties are due, which are overdue, which visits were refused access, and having evidence for all of it ready before a compliance review or a penalty notice. That's covered on a separate page — see Portfolio compliance — rather than folded into this one, which is written for the engineer doing the check, not the portfolio holder.
/ FAQ
Annually — every 12 months from the previous check, under GSIUR 1998.
Only an engineer on the Gas Safe Register. It is the sole legal UK registration body for gas work; there is no alternative route to issuing this document.
Yes, within 28 days of the check (or before a new tenant moves in, where that applies).
In practice, yes — "CP12", "landlord gas safety record" and "gas safety certificate" all refer to the same document in ordinary trade use. GSIUR 1998 is the regulation that requires it; CP12 is the name the trade uses for the resulting record.
The engineer records the finding on a CP14 Warning/Advice Notice (Immediately Dangerous or At Risk) rather than on the CP12. What happens next for a specific property — whether gas supply is cut off, what remedial work is required — is a matter for the attending engineer, not something this page can determine.
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