This Industry Bulletin outlines interconnection requirements for mains-powered smoke alarms installed as part of new building work, such as an addition or alteration, to existing dwellings. This information applies to the following residential dwellings as classified under the Building Code of Australia (BCA):

  • a Class 1a building (e.g. house, town house, villa etc);
  • a Class 1b building (e.g. small guest house, boarding house – less than 12 residents. Can also be four or more single dwellings, such as chalets, located on one allotment for short term holiday accommodation);
  • a sole-occupancy unit in a Class 2 or 3 building; (e.g. apartment, flat or unit); and
  • a Class 4 part of a building (e.g. a caretaker’s residence).

The requirements will depend on whether the original dwelling had its building permit application submitted before 1 May 2015 or on or after 1 May 2015.

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