Recommended good practice for landlords in Northern Ireland, not a statutory requirement. Every 2 years, and here is who can do it, which properties it covers and what the law says.
Every 2 years in Northern Ireland. The next one is due 2 years after the last.
A suitably competent person.
Yes. It applies to every rented property in Northern Ireland.
No. It is recommended good practice rather than a statutory duty in Northern Ireland. Health and Safety at Work (NI) Order 1978 and COSHH Regulations (NI) 2003 (HSENI, ACOP L8): landlords must assess the risk from legionella. No certificate or fixed interval in law; review every 2 years or when something changes.
Written from the same rule Beamwise uses to track this for properties in Northern Ireland, last updated 15 Sept 2026. Rules change, so check the legislation named above or take professional advice before relying on it.
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