Smoke alarms and safety switches: what landlords must actually do, by state

A failed smoke alarm in a rental property is rarely a $50 problem. In Queensland it's a non-compliance with the 2022 interconnected-photoelectric rules, fines up to $660 per breach, and in the event of a fatal fire potentially manslaughter exposure. The compliance gap between what landlords think they owe and what each state actually requires is wider than most insurers will tell you.

Smoke alarm and safety switch rules are state-legislated, and the eight jurisdictions have drifted apart over the last decade. A landlord with one property in Brisbane and one in Sydney is dealing with two different statutes, two different testing cadences, and two different penalty regimes. The headline obligation is the same everywhere: the property must be safe to live in. The detail of how that is proved varies enough that a generic checklist from a national property-manager brochure is not enough.

Smoke alarms: the state-by-state picture

The current 2026 position, indicative and worth verifying against the responsible state regulator before any installation or compliance work, runs as follows.

• NSW: at least one working smoke alarm per storey under the Residential Tenancies Regulation 2019. The landlord must check and ensure each alarm is working within 12 months of a new tenancy starting, and replace batteries and units as needed across the lease. Penalties up to roughly $1,100 for non-compliance, with separate offences possible per alarm.
• VIC: smoke alarms required under the Residential Tenancies Regulations 2021, with minimum standards including interconnection in new builds since 2014. Landlords test annually and replace every 10 years. The biennial electrical safety check is a separate obligation and is the lever the regulator uses to enforce wiring compliance.
• QLD: interconnected photoelectric smoke alarms in every bedroom, every hallway connecting bedrooms to the rest of the dwelling, and on every storey. The rule landed for rentals from 1 January 2022 under Fire and Emergency Services Act amendments, with full state rollout by 1 January 2027. Alarms must be hardwired with battery backup, or powered by a 10-year non-removable lithium battery.
• WA: hardwired smoke alarms, or 10-year-battery photoelectric units where wiring is not practical. Replace every 10 years. Landlord installs and maintains.
• SA: photoelectric units required since 2014, hardwired or 10-year-battery, with installation and maintenance a landlord responsibility.
• TAS: photoelectric alarms required from 2017. The landlord tests at the start of every new tenancy.
• ACT: photoelectric alarms in each bedroom and hallway, hardwired or running off a 10-year sealed battery.
• NT: photoelectric required; landlord tests at the start of each tenancy.

Queensland is the strictest of the eight. Victoria is the most paperwork-heavy because of the biennial electrical check. NSW sits in the middle on the substantive rule but enforces it through the agent at tenancy-start inspection. The other five jurisdictions cluster around photoelectric-and-10-year-battery as the operational standard.

Safety switches: the second compliance layer

Residual current devices, marketed as safety switches, are the other half of the rental electrical-safety regime. The state rules here are less uniform than the smoke alarm rules.

• QLD: safety switches mandatory for rentals from 2024, with earlier dates applying to new builds. Coverage extends to both power and lighting circuits.
• VIC: a biennial electrical safety check is mandatory under the Residential Tenancies Regulations 2021, and the AS/NZS 3000 wiring rules have required RCDs on power circuits since 1991. The enforcement mechanism is the safety check; the underlying obligation is general electrical law.
• WA: at least two RCDs covering all power and lighting circuits since 2009 for sold homes, and from 2009 and 2011 for rentals depending on the tenure type.
• NSW: no separate rental-only RCD mandate, but general building rules apply to any renovation or new construction. Where an RCD is installed and fails, landlord liability still attaches.
• SA, ACT, TAS, NT: rules vary. Most align with the national wiring standard AS/NZS 3000 for new electrical work but lack a rental-specific retrofit mandate.

The practical position for an investor is that any property built or substantially rewired in the last 20 years almost certainly has the required RCDs already. Older houses with original switchboards are the exposure. A pre-purchase electrical inspection during the cooling-off period is the cheapest way to find out which side of the line a given property sits on.

Who pays for what

The cost split between landlord and tenant is settled enough across most states to summarise in three lines.

• Landlord: installation, replacement, and the annual or biennial compliance test. Any unit past its 10-year service life is a landlord obligation to replace.
• Tenant: changing batteries during the tenancy in most states where the unit is not a sealed 10-year lithium type, plus any damage caused by negligence (for example, painting over an alarm or removing it from the ceiling).
• Property manager: typically charges $80 to $160 per year for a combined alarm, safety switch, and electrical inspection in QLD or VIC, billed to the landlord as part of the management schedule.

Insurance and civil liability

Landlord insurance policies in this country routinely require evidence of compliance with the relevant state smoke alarm and electrical standards. The policy document usually phrases it as a duty to maintain the property in accordance with applicable law. A non-compliant alarm at the time of a fire is enough to let an insurer decline indemnity, partly or fully, and the burden of proof sits with the landlord.

Civil liability extends beyond the insurance policy. In the event of injury or death, every state imposes a duty of care on the landlord under the relevant residential tenancies law and general tort principles. The defence of last resort is documented compliance: dated inspection reports, retained invoices from the electrician, and a clean paper trail showing the property was up to standard at the time of the fire.

A worked QLD example

Take a Queensland investor with a three-bedroom, two-bathroom rental, two of the bedrooms grouped off a hallway that opens onto the living area. The post-2022 rule needs interconnected photoelectric alarms in each bedroom, the hallway, and the living area where the hallway terminates. That is four alarms.

Upfront, hardwired interconnected units run around $120 per alarm installed. Add roughly $300 for the electrician's install time across the four points and a safety switch test on the way out at around $80. Total upfront retrofit at lease changeover comes to about $860.

Ongoing, the property manager bills an annual compliance inspection at around $120 a year. Over ten years, the all-in cost of staying compliant is $860 upfront plus $120 times ten, which is $1,200, for a total of $2,060.

The non-compliance scenario is worse on every axis. Discovered at the next lease end, the per-breach fine is $660 across four alarms, totalling $2,640, with the mandatory retrofit still owed on top at $860. That is $3,500 before any insurance impact and before any liability exposure if a fire occurs in the interim. The ongoing $120 a year is cheap insurance against the $2,640 fine alone, and the compliance paper trail is what keeps the landlord insurance policy live. Verify the arithmetic against your own quote from a licenced QLD electrician; alarm prices vary by brand and the electrician's hourly rate is the swing factor on the upfront number.

Building this into the investment numbers

Compliance costs sit in the operating-expense line of a rental property's P&L, the same line as council rates, insurance, and management fees. For a property renting at $560 a week, the $120 annual compliance inspection is about 0.4% of gross rent. Material, not a thesis-breaker. The retrofit cost is a one-time capital item the first time it lands, and from a tax perspective is usually a deductible repair rather than a depreciable improvement, depending on circumstances. The landlord tax deductions checklist walks through which side of the repair-versus-capital line a given alarm or RCD spend lands on.

Yield modelling should bake the ongoing inspection cost into the operating expense assumption from the start. Run the numbers on the rental yield calculator with a realistic management-and-compliance figure rather than the headline rent. For investors weighing whether the cash drag is worth the structural tax position, the negative gearing calculator will show the after-tax effect of a few hundred dollars of additional deductible expense per year.

The insurance conversation worth having

Most landlord insurance policies sold in this country cover fire damage, tenant default, and a baseline of public liability. The detail that matters here is the compliance warranty buried in the policy schedule. Before the next renewal, three questions are worth putting in writing to the insurer.

• Does the policy require a current smoke alarm compliance certificate as a condition of cover, and if so, what frequency.
• How is RCD compliance treated, and is a state-mandated biennial electrical safety check sufficient evidence.
• What happens to the policy response if a tenant deliberately disables an alarm during the tenancy and a fire follows. The answer varies by insurer and is the single most useful piece of information a landlord can have on file.

The landlord insurance guide covers the broader policy-shopping question; the compliance-warranty piece is the specific item to flag with any broker before signing.

Practical compliance routine

For an investor running one to three rentals without a property manager, the routine that keeps the paperwork clean is short.

• Book the annual or biennial inspection on a recurring calendar entry, tied to the lease anniversary date.
• File the resulting compliance certificate in a single folder per property, alongside the insurance schedule and the most recent rates notice.
• Replace any alarm at the 10-year mark, regardless of whether it is still beeping. The date stamp is on the unit; the install date should be in the file.
• At every tenancy changeover, run a fresh inspection before the new tenant signs. The certificate dated to the start of the lease is the clearest evidence of compliance if anything goes wrong later.

Where the rules are heading

The direction across all eight states over the last decade has been one-way: stricter, more prescriptive, and more uniform around interconnected photoelectric as the minimum. Queensland set the high-water mark in 2022. Victoria and NSW are the most likely candidates to follow with their own interconnection rules in the next few years, and the model fire-safety rules being discussed at the national-cabinet level point toward the same direction. An investor retrofitting now to the QLD standard is buying compliance with rules that may not yet exist in their own state but probably will before the alarm reaches the end of its service life.

On Burbfinder, the suburb and region pages surface the rental and yield data investors use to scope a purchase. The compliance overlay sits on top of that, and the cost is small relative to the income the property produces. Treating it as a fixed operating cost and a fixed capital item, baked into the model from day one, is the sober way to read the obligation. The downside of getting it wrong is large enough that the upside of getting it right is mostly the absence of trouble.