Gas safety certificate expired? Grace periods and fines

A landlord gas safety certificate lasts 12 months. Regulation 36 of the Gas Safety (Installation and Use) Regulations 1998 requires each appliance and flue you provide to be checked at intervals of not more than 12 months. There is no grace period after that deadline. Regulation 36A lets you check up to two months early; its one late option only aligns appliance dates. Checked October 2026.

This guide explains what the rules allow, what to do the day you find a record has lapsed, and what a lapse can cost. We are EliteShires Property Services, on Kenton Lane in Harrow. We carry out landlord gas safety checks across Harrow, Kenton, Stanmore and Edgware, and issue the record on the day. Expired records usually come to light when an agent or a new tenant asks for a copy.

How long does a landlord gas safety certificate last?

It lasts 12 months from the date of the last check, for each appliance and flue. Regulation 36(3) sets two clocks:

• Ongoing. Each appliance and flue must be checked within 12 months of being installed, then at intervals of not more than 12 months.
• New lease. Before a new tenancy starts, each appliance and flue must have been checked in the 12 months before it begins.

The "certificate" is the landlord gas safety record, often called a CP12. Its date is what counts, not the tenancy start date. A new tenancy does not restart the 12 months. What the record must show is covered in our guide to the CP12 gas safety record.

Is there a grace period after a gas safety certificate expires?

No. If the check is not done by the deadline, you are in breach of regulation 36 from the next day. HSE's guidance for landlords describes only one flexibility. You can have the check done up to two months before the deadline and keep the original date.

Regulation 36A(1) says a check completed "within the period of 2 months ending with the deadline date" is treated as made on the deadline date. So a check in that window costs you no time. A check before the window restarts the 12 months from the day it is done.

What is the two-month "after" rule, then?

It is an alignment tool, not a grace period. Regulation 36A(2) lets a landlord check an appliance in the two months beginning with its deadline. Regulation 36A(3) limits this to "only once in relation to each appliance or flue". It must also be done "only in order to align the deadline date" with another appliance or flue in the same property.

It is meant for a property where, say, a new gas fire was fitted mid-year. That fire then has its own anniversary. You can use the rule once to bring it into line with the boiler's date. You cannot use it because the date was missed. Our guide to what changes the price of a gas safety check explains how lining dates up saves a visit.

What should you do the day you find it has lapsed?

Book the check straight away, tell the tenant in writing, and keep a record of every step. The lapse has already happened, so the aim now is to end it quickly and show you acted. We suggest this order:

1. Book a Gas Safe registered engineer now. Ask for the first available slot. We issue the record on the day of the check.
2. Write to the tenant the same day. Explain that the annual check is overdue, why it matters, and offer more than one appointment. Keep a copy.
3. Ask about warning signs. If anyone smells gas, call the gas emergency number, 0800 111 999, straight away. HSE says it is illegal to use a gas appliance you suspect is unsafe. Check that the CO alarm in any room with a boiler or fire is working.
4. Hold any new move-in. A new tenant must get a copy of the last record for each appliance before they occupy (regulation 36(6)(b)), and that check must fall within the 12 months before the tenancy starts. Don't hand over keys until the check is done.
5. Act on what the engineer finds. An appliance classed as immediately dangerous or at risk needs follow-up before it is used. Our guide to immediately dangerous and at risk gas appliances explains each label.
6. Give the tenant the new record within 28 days of the check (regulation 36(6)(a)). An emailed copy is fine if the tenant agrees.
7. Send it on where required. A licensed property must produce its gas certificate to the council each year. If you use a managing agent, send them a copy too.
8. Fix the diary. Note the new anniversary and set a reminder for the start of the next two-month window.

What are the fines for an expired gas safety certificate?

There is no fixed fine. A lapse is a criminal offence under the 1998 Regulations, enforced by the Health and Safety Executive through the courts. HSE's landlord guidance says a breach "could result in a substantial fine and/or a custodial sentence". The court sets the penalty.

Three other consequences follow in our area:

• Licence conditions. Every HMO and selective licence must require the holder to produce a gas safety certificate to the council each year, where gas is supplied (Housing Act 2004, Schedule 4). Missing that is a separate licence breach.
• The landlord register. Under draft regulations awaiting Parliament's approval, landlords will upload their gas safety record to the new private rented sector database. London registration runs from 15 July to 14 October 2027. A lapsed record will show. Our guide to the landlord register has the detail.
• Hazard enforcement. A faulty boiler or flue can also be a hazard under the Housing Health and Safety Rating System. Councils can act on that separately.

Older articles say a missing gas record stops you serving a section 21 notice. Section 21 was abolished by the Renters' Rights Act 2025 on 1 May 2026, so that advice no longer applies. The full penalty picture is in our guide to landlord fines.

Which local properties must also produce a gas certificate to the council (checked October 2026)

Our guide to licensing in Harrow, Brent and Barnet shows which scheme covers your address.

What if the tenant won't let the engineer in?

Keep trying, and keep a record of every attempt. Regulation 39 is a defence for a landlord who "took all reasonable steps". HSE says its inspectors look for at least three attempts. It also says you must not force entry.

Refusal does not stop the 12 months running out, so start asking for access as soon as the early window opens. Our guide to a tenant refusing access sets out the letters and the access log step by step.

Does a new boiler or a new tenant change the renewal date?

A new appliance does, a new tenant does not. A new boiler, hob or fire must be checked within 12 months of installation. That can leave one property with two anniversaries. You can then use the once-per-appliance alignment rule to bring the dates together.

A change of tenant leaves the date alone. But the new tenant must receive the current record before moving in. The check must also have been done in the 12 months before the tenancy starts. HSE recommends a further check before re-letting if the property stood empty and appliances could have been tampered with. Our table of landlord certificate renewal dates sets the gas date next to the EICR and EPC.

How do you stop the record lapsing again?

Book each check in the two months before the deadline, so an access problem or a cancelled visit still leaves time. Put the deadline and the window start in your diary for every property.

If you have several properties, group the checks into one visit where the windows overlap. If the EICR falls due in the same year, one booking for the gas check and electrical inspection brings the two dates into line. We diary every gas check we carry out and contact you in the two months before it is due. Book through our gas safety certificate page, or use the local pages for a gas safety check in Harrow, landlord gas checks in Kenton, Stanmore gas safety records and gas certificates in Edgware. Certificates are a fixed price, confirmed before we attend.