If your property is rented out the regulations require private rented sector landlords, from 1 October 2015, to have at least one smoke alarm installed on every storey of their rental property which is used as living accommodation, and a carbon monoxide alarm in any room used as living accommodation where solid fuel is used - after that, the landlord must make sure the alarms are in working order at the start of each new tenancy. But these regulations are subject to change very shortly.