If you let out a property with any gas appliance in it, the law puts a clock on you that never stops running. The answer is once every 12 months, but the detail around that number is where most landlords come unstuck. Here is how the timing actually works, what has to be checked, and what to do when a tenant will not let you in.
Under the Gas Safety (Installation and Use) Regulations 1998, every gas appliance and flue that you as the landlord own or are responsible for must be checked for safety at intervals of no more than 12 months. The check has to be carried out by an engineer on the Gas Safe Register, and it produces a Landlord Gas Safety Record, still widely called a CP12.
It applies whether the property is a two bed terrace in Crewe, a farmhouse outside Tarporley or a flat above a shop in Chester. It applies to boilers, gas fires, gas hobs and cookers, and to LPG as well as mains gas. It does not matter how new the boiler is, and it does not matter if the tenant has only just moved in.
This is the bit worth knowing. Since April 2018 you can have the check done at any point in the 10th, 11th or 12th month after the last one and keep your original expiry date. So if your certificate runs out on 14 September, an inspection done in July, August or early September still leaves the next deadline as 14 September.
Before that change, landlords who booked early effectively shortened their own cycle every year, and the date crept backwards until it landed somewhere inconvenient. If you go earlier than the 10th month you lose that protection and the clock restarts from the new date. In practice, aim for roughly six to eight weeks before expiry. That gives you room for a failed appliance, a part on order, or a tenant who works away.
The check itself is only half the duty. You must give a copy of the record to existing tenants within 28 days of the inspection, and to any new tenant before they move in. Keep copies for at least two years, because you may need to show a run of them rather than just the current one.
In England, a valid gas safety record also has to have been served on the tenant before a Section 21 notice will stand up. Landlords lose possession claims on this point regularly, so treat the paperwork as seriously as the inspection. Email with a read receipt, or a dated letter kept on file, is usually enough evidence of service. If your property falls under a selective or HMO licensing scheme, the council will normally ask for the record as a condition too.
Across Cheshire, a landlord gas safety check on a single boiler typically runs somewhere in the region of £60 to £100, with more appliances pushing it higher, often £15 to £30 each. Rural properties on LPG, or anywhere with a long drive time, may sit at the upper end. Any remedial work is separate, and a good engineer will tell you the cost before touching anything.
One common misunderstanding: a safety check is not a service. The check confirms the appliance is safe right now, looking at gas pressure, burner condition, ventilation, flue performance and combustion readings. A service goes further and cleans and inspects the internal components, which is what most manufacturers require to keep a warranty valid. Many landlords book both together, which usually costs less than two separate visits.
You are still legally responsible, but you are not expected to force entry. What matters is showing that you took all reasonable steps. Write to the tenant explaining the check is a legal safety requirement, offer several dates including evenings or weekends, and keep copies of every letter, text and email along with the engineer's record of a no access visit.
Repeat the attempts rather than giving up after one. If access is still refused after several genuine tries, seek advice before doing anything else, and never let the certificate simply lapse in silence. A documented paper trail is what protects you if the worst happens.
No. If the property is entirely electric with no gas supply and no gas appliances, the regulations do not apply. Bear in mind that a capped but live gas supply, or an LPG bottle feeding a fire, still counts.
You are not responsible for appliances the tenant owns, but you are responsible for the pipework and the connection point serving them, and the engineer should still inspect the flue and ventilation of the room. If a tenant's appliance looks unsafe, it should be reported to them in writing.
It is a criminal offence, and the Health and Safety Executive can prosecute, with fines that are unlimited in serious cases. More immediately, an expired record can invalidate your landlord insurance and block a Section 21 possession claim.
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