Landlords and HMOs2 minute readUpdated October 2026

Scotland's interlinked fire alarm rules

What the Scottish interlinked fire alarm law requires in every home, for owners and landlords, including heat, smoke and carbon monoxide alarms.

Since 1 February 2022, every home in Scotland has had to meet the same standard for fire and smoke alarms, whether it is owned or rented. The rule was introduced after the Grenfell Tower fire and is part of the tolerable standard.

What every home needs

  • One smoke alarm in the room most used for general daytime living, usually the living room.
  • One smoke alarm in every circulation space on each storey, such as hallways and landings.
  • One heat alarm in every kitchen.
  • All alarms interlinked, so that when one goes off they all go off.
  • A carbon monoxide alarm where there is a fixed combustion appliance such as a boiler, fire or heater, or a flue.

What type of alarms?

Alarms can be mains-wired with a backup battery or sealed long-life lithium battery alarms that last for the life of the alarm, up to ten years. Interlinking can be by wire or radio. For landlords, mains-wired systems are the usual expectation.

Who is responsible?

The homeowner is responsible for owner-occupied homes. For private rented homes, the landlord must meet the Repairing Standard, which includes the alarm requirements. Social landlords must also comply.

Flats and tenements

The rules apply to each flat individually. Common closes and stairs are not part of the flat, so alarms are not needed there under this rule, although the building's fire risk assessment may call for other measures in the common parts.

This guide is general information about UK fire safety law and standards, not legal advice for a specific building. If you are unsure what applies to yours, ask us or a qualified adviser.

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