Smoke and carbon monoxide alarms

Information for landlords and tenants

Changes to fire detection requirements (BS-5839-6-2019)

By law all single family homes must now have a Grade D1 Category LD2 fire detection system.

What does this mean?

All single family homes must have a system incorporating interlinked mains wired detectors in all circulation areas that form part of the escape routes from the property, and in all specified rooms or areas that present a high fire risk to occupants, including any kitchen and the principal habitable room.

In simple terms the following is required (two storey, single family home):

  • A heat detector in the kitchen
  • A smoke detector in the lounge (or principal living room),
  • A smoke detector in the hallway,
  • A smoke detector in the first floor landing.

The interlink can be hardwired or wireless.

Installation should be undertaken by a suitably qualified and approved electrical engineer.

Carbon Monoxide


  • a carbon monoxide (CO) alarm in any room is used as living accommodation, containing a solid fuel burning combustion appliance

The law requires that checks are made by or on behalf of the landlord to ensure that each alarm is in proper working order on the day a new tenancy begins.  We may issue a penalty charge of £5000 for non-compliance.

How we can help

We are here to help landlords understand their legal obligations and provide basic information about smoke and CO alarms to landlords and tenants where appropriate.

Further information

Contact information

Private sector housing team