What you must do
Does this apply to your property?
This obligation only applies if your property contains gas appliances, fittings, pipework or flues that you as the landlord provide. If your property has no mains gas supply or gas appliances at all, these regulations do not apply to you.
This distinction matters in Northern Ireland because most NI homes are heated by oil rather than mains gas. Many NI landlords have no gas safety duty under these regulations whatsoever. If your property uses oil-fired central heating, you are not subject to the Gas Safety (Installation and Use) Regulations (Northern Ireland) 2004 — oil appliances fall under a separate regime (OFTEC) and an annual oil service, while strongly recommended for safety and insurance purposes, is not a statutory requirement for residential lets in NI. If your property has oil heating and no gas appliances, this page may not apply to you. If you are unsure, check with HSENI or a qualified engineer.
What the annual check covers
Every 12 months, a Gas Safe registered engineer must inspect and test every gas appliance, flue and associated pipework that you as the landlord provide. The purpose of the check is to confirm that each item is safe to use.
Appliances owned and brought in by the tenant themselves are not your responsibility to check — but you remain responsible for any landlord-provided pipework and flues, even where a tenant uses their own appliances.
The presence of gas appliances and other fixed combustion appliances in a rented property also triggers a separate obligation to install carbon monoxide alarms; see the smoke, heat and CO alarms guide.
Who must carry out the check
The check must be carried out by an engineer who is registered with the Gas Safe Register. Gas Safe is the UK-wide official registration body for gas engineers and its registration covers Northern Ireland. You can search for a registered engineer by postcode on the Gas Safe Register website. Always confirm that the engineer's registration covers the type of appliance being checked (e.g. natural gas or LPG).
The gas safety record
After the check, the engineer will issue a gas safety record. You must:
- Give a copy to existing tenants within 28 days of the check being carried out.
- Give a copy to new tenants before or at the start of their tenancy.
- Keep records until at least two further annual checks have been carried out (i.e. for a minimum of two check cycles).
New boilers and newly installed appliances
If a boiler or other gas appliance has just been installed, the first annual check is not due until 12 months after the installation date. Obtaining a commissioning certificate at the point of installation is good practice and provides a clear starting point for the 12-month cycle.
If the engineer finds a defect
If an appliance is found to be unsafe, it should be taken out of service (isolated) until it has been repaired or replaced. The engineer will advise on the classification and urgency of any issue. Do not continue to use, or allow tenants to use, an appliance that has been declared unsafe.
Access for the check
You are responsible for taking reasonable steps to gain access to the property to carry out the annual check. It is good practice to include a clause in the tenancy agreement that requires the tenant to permit access for gas safety inspections on reasonable notice. If access is refused, document your attempts to arrange the check.
Penalties and enforcement
Failure to meet gas safety duties is a criminal offence enforced by the Health and Safety Executive for Northern Ireland (HSENI). Landlords who do not comply can face prosecution, with penalties including fines and/or imprisonment. Beyond the regulatory penalty, failure to comply may affect your landlord insurance cover in the event of a gas-related incident, and can also affect your position in possession proceedings.
Penalty levels are set in law and can change. Verify current penalty levels directly with HSENI before relying on any specific figure.