Smoke Alarms: What Victorian Law Requires in Your Home

Two in the morning, one short chirp, and nobody can work out which alarm it came from. That is usually a flat battery. The bigger question is whether the alarms in the house are the right type, in the right places, and still within their working life.

Victoria has clear rules about this, and what applies depends on when your home was built.

What the law requires depends on your build date

The Country Fire Authority states that since 1 August 1997, Victorian law requires smoke alarms complying with Australian Standard AS 3786 to be installed in all homes, units, flats and townhouses.

Which sort of alarm you need comes down to the build date:

• Built before 1 August 1997: standalone, battery powered alarms are enough, according to the CFA.
• Built after 1 August 1997: the CFA says alarms must be connected to 240 volt mains power, and must also have a backup battery in the alarm in case there is a loss of power.
• Built or largely renovated after 1 May 2014: where more than one alarm is needed, the CFA says all alarms must be interconnected, so that if one activates, they all will.

That last point catches people out. A house that only ever needed a couple of battery alarms can land in a different category after a major renovation.

Where the alarms have to be

Fire Rescue Victoria puts the placement rules plainly. By law, at least one smoke alarm must be installed on each level of a house, and smoke alarms must be installed between each sleeping area and the rest of the house.

The CFA gives the same guidance: one between each sleeping area and the rest of your home, and one on each level.

Walk the place and count. A single alarm in the hallway does not cover an upstairs bedroom, and a bungalow or a converted garage that someone sleeps in is a sleeping area.

There is a reason the rules are built around bedrooms. The CFA notes that most fatal fires happen in the sleeping hours between 8pm and 8am, and that when you are asleep you lose your sense of smell. It also points out that a small fire can grow to involve an entire room in just two to three minutes.

The age of the unit matters, not just the battery

A smoke alarm does not last forever, and a test button that still beeps does not prove the sensor is doing its job.

Fire Rescue Victoria's maintenance schedule calls for the unit itself to be replaced every ten years. Take a torch, get up close, and look for a date printed on the alarm. If there is no date you can read, or the alarm has been up there longer than you have owned the house, treat it as due.

Testing and cleaning, and which jobs are actually yours

Fire Rescue Victoria sets out a simple schedule:

• Test every month. Press and hold the test button until the smoke alarm beeps three times.
• Clean the alarm every year as a minimum.
• Replace a 9 volt battery every year.
• Replace the unit itself every ten years.

Changing a battery is not electrical work. Consumer Affairs Victoria states that anyone can change a smoke alarm battery, but that a hard-wired smoke alarm must be installed by a qualified electrician.

Press the button, change the battery, keep the alarm free of dust. Anything that involves taking a mains connected alarm off the ceiling is work for a licensed electrician.

Fire Rescue Victoria's recommended best option is a wireless interconnected smoke alarm with a 10 year lithium backup battery, so that when one alarm sounds, all alarms will sound. In a long house, or a two storey home with the bedrooms upstairs, that is the difference between being woken and sleeping through it.

If you rent the property out

The duties here are specific. Consumer Affairs Victoria states that rental providers must ensure smoke alarms are correctly installed and in working condition, and are fitted with batteries or replacement batteries.

• Alarms must be tested at least once every 12 months, in accordance with any instructions by the manufacturer.
• From 25 November 2025, all rental properties must have annual smoke alarm safety checks.
• Broken smoke alarms are urgent repairs, and Consumer Affairs Victoria says the rental provider must immediately arrange for the alarm to be repaired or replaced.

Renters carry duties too. They must not deactivate or remove a smoke alarm or interfere with its operation in any way, and they must notify the rental provider or rooming house operator if an alarm is faulty or not working.

What to do next

Walk through the house with a torch tonight. Count the alarms, check there is one on each level and one between every sleeping area and the rest of the house, press each test button, and look for a date on the unit.

If alarms are missing, if a mains connected alarm is past its ten years, or if a renovation has left you needing interconnected alarms, that is work for a licensed electrician. If the property is rented out, the annual safety check is a legal duty rather than a good habit, so book it rather than leaving it to the next routine inspection.