WA smoke alarm rules for Perth homeowners and landlords
If a Western Australian dwelling is being sold, rented or hired, the owner needs compliant smoke alarms in place. Checking the alarm date and power source early can prevent a last-minute delay.
What makes a smoke alarm compliant?
WA Building and Energy says alarms in dwellings being sold, rented or hired must be in working order, permanently connected to mains power, no more than 10 years old and not past their expiry date. They must comply with the Building Code requirements that applied when installed and carry the relevant AS 3786 marking.
There are limited circumstances in which a battery-powered alarm may be permitted, such as where there is no concealed space to run wiring and no suitable alternative location. Treat this as an exception that needs property-specific advice.
Where are alarms normally required?
For a typical detached house, alarms are generally installed in corridors associated with bedrooms, or between bedrooms and the rest of the home when there is no corridor. An alarm is also required on each storey, including a storey without bedrooms. Placement near ceilings must avoid dead-air spaces, and different building classifications can have different requirements.
Do multiple alarms need to be interconnected?
Where more than one smoke alarm is installed, current Building Code requirements generally call for interconnection so all alarms sound when one activates. WA guidance notes an exception for dwellings constructed under a building permit application made before 1 May 2015. An electrician can check what applies to the dwelling and existing installation.
Who can install a mains-powered smoke alarm?
Only a licensed electrical contractor can connect or disconnect a mains-powered smoke alarm. A homeowner can still carry out routine user maintenance described by the manufacturer, such as testing the alarm, but should not alter fixed wiring.
A practical pre-sale or rental checklist
- Find the manufacture or replacement date on every alarm.
- Check that each alarm is working and has not expired.
- Confirm the alarms are mains-powered unless a valid exception applies.
- Check coverage on every storey and near sleeping areas.
- Ask whether required alarms are interconnected.
- Book replacement early if settlement or a new tenancy is approaching.
What about nuisance alarms?
Steam and cooking can trigger nuisance alarms when a unit is poorly located. Do not disable the alarm. Ask a licensed contractor to assess compliant positioning and whether a different suitable alarm type would reduce unwanted activation.
Official reference: WA Building and Energy: smoke alarm laws for homes being sold, rented and hired.
