Hardwired smoke alarm requirements for Victorian rental properties

Smoke alarm compliance for Victorian rental properties has tightened significantly in recent years and continues to tighten. If you're a landlord or a property manager handling residential rentals across Melbourne, you need to know what's currently required, what changes are in the pipeline, and how to spot a non-compliant install before it becomes a problem at the next safety inspection.

This post walks through the current requirements as of 2026, the practical implications for older properties, and how the smoke alarm check fits into the 2-yearly rental electrical safety check that's mandatory under the Residential Tenancies Regulations 2021.

The current requirements

In Victoria, smoke alarms in residential premises must comply with the Building Regulations 2018 and AS 3786:2014. For rented properties, the additional requirements under the Residential Tenancies Act 1997 (and the 2021 Regulations) apply on top.

The combined requirements break down into five practical points.

1. Photoelectric, not ionisation

All smoke alarms in Victorian residential premises must now be photoelectric — they detect smoke particles using a light beam, not radioactive ionisation. Photoelectric alarms respond significantly faster to smouldering fires (the kind that cause most residential fatalities) than older ionisation alarms.

If you find an older alarm with a circular orange or red sticker mentioning "Am-241" or "ionisation", that's a non-compliant ionisation alarm and needs replacing.

2. AS 3786 compliant

The alarm must carry the AS 3786 certification mark — usually printed on the unit itself. Cheap imports without certification are not legally usable in Victorian rentals.

3. 10-year service life — replacement, not refurbishment

Smoke alarms have a 10-year service life from the date of manufacture, not the date of install. Look for the "manufactured" date stamped on the back or side of the unit. After 10 years the sensor degrades and the alarm becomes unreliable regardless of whether the test button still chirps.

We routinely find 1990s-vintage alarms still installed in rental properties. Those need immediate replacement.

4. Hardwired (mains-powered) for new builds and major renovations

For homes built or substantially renovated since 1997, smoke alarms must be hardwired — connected to the home's electrical supply with a 9V battery backup. This is to ensure the alarm continues to function in a power outage and doesn't fail when a homeowner forgets to replace the battery.

Older homes built before 1997 may legally still have battery-only alarms, but in practice we recommend upgrading to hardwired during any electrical work because:

• The Victorian Building Regulations 2018 require hardwired in any new construction or major renovation
• Insurers increasingly look at smoke alarm compliance during fire-related claims
• Hardwired alarms with battery backup are simply more reliable

5. Interconnection — the recent change most landlords miss

This is the requirement most likely to catch out older rentals. Interconnected smoke alarms mean that when one alarm detects smoke, all alarms in the property sound simultaneously. This dramatically reduces response time in larger homes where the fire might be detected by an alarm in an unoccupied bedroom.

Interconnection has been required for all new dwellings and major renovations since 2017, and the Victorian government has been progressively pushing for it across all rental properties through tightening Building Code provisions and Residential Tenancies guidance.

In practice: if your rental property has multiple separate alarms that don't communicate with each other, you should plan to upgrade them at the next major electrical work or at the next 2-yearly safety check.

Interconnection can be either:

• Hardwired interconnection — the alarms are physically connected via a third "interconnection" wire (preferred, most reliable, required for new installs)
• Wireless interconnection — modern alarms can talk to each other over RF or mesh networks (acceptable for retrofits where running new cable is impractical)

6. Where they have to be installed

The minimum positions for Victorian residential smoke alarms:

• In every bedroom (or every "sleeping area" if there's an open-plan study/bedroom)
• In hallways or corridors leading to bedrooms
• On every floor including basements and habitable lofts
• Within 3m of any bedroom door if the alarm isn't inside the bedroom itself

The actual count for a typical 3-bedroom Victorian home is 4-5 alarms (3 bedrooms + hallway + living/family area).

Common non-compliance patterns we find

We see the same patterns across older rentals during 2-yearly safety checks:

"Battery-only alarms in a hardwired-required home"

The original alarms were removed during renovation and replaced with cheap battery units to avoid an electrical job. Landlord doesn't know. Property manager doesn't check. This is non-compliant for any home built or substantially renovated since 1997.

"Single alarm in the hallway"

The whole property has one smoke alarm in the central hallway. None in bedrooms, none on the upper floor of a two-storey home. Non-compliant since the requirements were tightened — minimum coverage isn't being met.

"Alarms older than 10 years still installed"

The property hasn't been inspected for smoke alarm replacement since the original install. Manufactured date 2008-2010. Non-compliant — the sensors are at end-of-life regardless of whether they still beep.

"No interconnection in newer multi-alarm installs"

The property has multiple alarms but they're not connected. Each operates independently — a smoke detection in a back bedroom won't wake people sleeping in a front bedroom. Non-compliant for any post-2017 install.

"Ionisation alarms in older units"

Unit blocks built in the 1980s-90s sometimes still have the original ionisation alarms with the orange/red Am-241 sticker. Required upgrade to photoelectric.

What the 2-yearly safety check does

Under the Residential Tenancies Regulations 2021, every Victorian residential rental requires an electrical safety check every 2 years. The smoke alarm component covers:

• Visual inspection of all installed alarms (count, position, type, age)
• Test of every alarm's audible signal and interconnection (if applicable)
• Battery replacement on hardwired alarms (the 9V backup)
• Manufactured-date check against 10-year service life
• Compliance verification against current Building Regulations

Where alarms are non-compliant or end-of-life, the check produces a recommendation for replacement. The COES is issued only after rectification — so non-compliance is something the landlord has to address before the inspection cycle is complete.

What we recommend for landlords

Three practical steps, depending on your property's current state:

If your rental was built or last renovated before 1997 and has battery-only alarms

Plan to upgrade to hardwired interconnected photoelectric alarms at the next major electrical work, or sooner if any alarm is over 10 years old. The upgrade typically takes a single day for a 3-4 bedroom home — we run the cabling, install the alarms, interconnect them, and lodge the COES.

If your rental has hardwired alarms but they're not interconnected

Add interconnection at the next 2-yearly safety check. We can retrofit either hardwired or wireless interconnection depending on access — wireless is faster and minimally invasive.

If your rental has compliant hardwired interconnected alarms

Confirm the manufactured dates and plan replacements as the 10-year mark approaches. We can build alarm-replacement notes into your portfolio's safety check schedule so there are no surprises.

How we handle it for property managers

For property managers handling multiple rentals, we batch the smoke alarm work into the broader 2-yearly safety check cycle. One visit per property covers:

• Full electrical safety check
• Smoke alarm visual + audible test
• Battery replacement
• Replacement of any expired or non-compliant units
• COES lodged with Energy Safe Victoria
• Compliance summary back to the property manager

We carry stock of compliant photoelectric AS 3786 alarms in the van for in-the-moment replacements where the unit on site is end-of-life.

If you're a landlord or property manager and want to bring your rental portfolio into clear compliance, book a safety check and we'll work through it with you.