Smoke and CO Alarm Requirements in Northern Ireland

Moving In & Out Procedures Northern Ireland 3 min read · published March 29, 2026 Flag of Northern Ireland

Tenants and renters in Northern Ireland need to know what safety devices should be fitted in a private rental and who must keep them working. This guide explains your rights and practical steps on smoke alarms and carbon monoxide (CO) alarms when you move in, during tenancy, and at move-out. It covers landlord responsibilities under Northern Ireland tenancy law, what checks you should do as a tenant, how to report faults, and where to find official forms and the tribunal that resolves disputes. If an alarm is missing or faulty, follow the steps here to stay safe and to document the issue before contacting your landlord or the appropriate authority.

What the law requires

Landlords in Northern Ireland must ensure rented homes meet legal safety and habitability standards under the Private Tenancies Act (Northern Ireland) 2022.[1] That duty includes fitting appropriate smoke and carbon monoxide alarms and keeping the property in a safe condition unless a tenancy agreement clearly sets out different responsibilities. Tenants should know these basics so they can check devices on move-in and raise concerns quickly.

Landlords must provide safe, habitable accommodation.

Smoke alarms

As a tenant, expect a working smoke alarm on each floor used as living accommodation and test alarms regularly. Official guidance for fitting and positioning is provided by Northern Ireland government resources.[2]

  • Check within 7 days that each floor has a working smoke alarm when you move in.
Keep copies of messages, emails and photos when you report safety faults.
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Carbon monoxide (CO) alarms

CO alarms are required where there are fixed combustion appliances (for example gas, oil or solid fuel boilers or heaters). If you suspect CO or an alarm sounds, leave the property and seek help. Guidance on CO alarm siting and maintenance is available from Northern Ireland official guidance.[2]

  • Ask your landlord to repair or service any faulty appliance that may produce CO as soon as possible.
Respond to alarm activations immediately and safely.

If your landlord does not comply

If a landlord will not fit or repair required alarms after you report the problem, start by sending a short written request and keep a copy. If there is no satisfactory response, you can contact the Department for Communities Private Tenancies Branch for advice and next steps or consider applying to the relevant tribunal for a resolution.[3]

  • Send a clear written request to your landlord describing the fault and the action you want, and keep proof you sent it.
  • Contact the Private Tenancies Branch for guidance on official complaints and available forms.
  • Apply to the appropriate tribunal if informal steps fail; the tribunal can order repairs or other remedies.
Documenting dates, photos and communications strengthens your case in a dispute.

FAQ

Who must install smoke and CO alarms?
Your landlord is generally responsible for installing required alarms and ensuring they work when you move in; tenants must test them and report problems.
How often should I test alarms?
Test smoke and CO alarms at least once a month and record checks or save a dated photo as proof.
What if my landlord ignores a safety complaint?
If a landlord does not act, send written requests, contact the Private Tenancies Branch for advice, and you may apply to the tribunal for a resolution.

How-To

  1. Check all smoke and CO alarms within 7 days of moving in and note the dates.
  2. Report any faults in writing to your landlord and keep a copy of the message and photos.
  3. Contact the Private Tenancies Branch if the landlord does not respond or refuses to fix the issue.
  4. Apply to the appropriate tribunal if necessary, using the tribunal application process on the official site.

Help and Support / Resources


  1. [1] Private Tenancies Act (Northern Ireland) 2022 - legislation.gov.uk
  2. [2] Smoke and carbon monoxide alarms guidance - nidirect
  3. [3] Private Tenancies Branch, Department for Communities - communities-ni.gov.uk

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Alistair MacPherson
Alistair MacPherson

Scottish & Northern Irish Tenancy Law Analyst, Tenant Rights UK

Alistair specialises in the distinct private tenancy frameworks of Scotland and Northern Ireland. He has closely followed the development of the Scottish Private Residential Tenancy since its introduction and advises on Housing Rights NI processes and protections.