Legal Requirements for Alarms in HMOs
The legal framework for CO and smoke alarms is clear. All HMOs must have a working smoke alarm on each storey used as living accommodation, and a carbon monoxide alarm in any room used as living accommodation where there is a fixed combustion appliance (excluding gas cookers). These are separate requirements from the gas safety certificate itself but are often checked concurrently during an inspection due to their direct link to occupant safety. Non-compliance is a serious matter, and enforcement by Wigan Council can lead to prohibition orders or significant fines.
- Smoke alarms on every occupied storey.
- CO alarms for fixed combustion appliances.
- Alarms must be working at tenancy start.
- Landlord responsible for annual checks.

