Queensland’s smoke alarm laws have been rolling out in stages since 2017, and the final stage lands on 1 January 2027. From that date the rules stop being something that only matters when you sell or lease. They apply to every domestic dwelling in the state, including the home you live in and have no plans to sell.
We fit compliant systems across the Gold Coast, Brisbane and Logan, and the questions we get are nearly always the same. What exactly counts as compliant? Can I keep my existing alarms? Do they have to be hardwired? This guide answers those questions in plain terms.
What the Queensland law requires
A compliant home in Queensland needs smoke alarms that meet all of the following:
- Photoelectric type, complying with AS 3786-2014. Ionisation alarms are not permitted, even if they still work.
- Interconnected, so when one alarm sounds, every alarm in the house sounds with it.
- Hardwired or powered by a 10-year non-removable lithium battery. Alarms with a replaceable 9-volt battery don’t meet the standard.
- Installed in every bedroom.
- Installed in hallways that connect bedrooms to the rest of the dwelling, or if there is no hallway, between the bedrooms and the rest of that storey.
- Installed on every storey, even a level with no bedrooms.
These requirements have applied to homes being sold or leased (including lease renewals) since 1 January 2022. From 1 January 2027 they apply to all domestic dwellings. NSW rules are different and less demanding, requiring at least one working smoke alarm on each level, so if you own property on both sides of the border, don’t assume one approach covers both.
Why interconnection matters so much
Most house fires that end badly start at night, in a part of the house away from where people are sleeping. A single alarm in the hallway might not wake someone behind a closed bedroom door with the air conditioner running. Interconnection means a fire starting in the lounge room sets off the alarm right above your bed.
Photoelectric alarms are also better at detecting the slow, smouldering fires that produce a lot of smoke before much flame. That’s the type of fire that tends to catch people asleep, which is the reason the law settled on photoelectric only.
Hardwired or 10-year lithium: which is right for your home?
Both options are legal, and both can be interconnected. The choice usually comes down to your existing setup and how the house is built.
If you already have hardwired alarms, the rules say they must be replaced with hardwired alarms. You can’t swap a mains-powered alarm for a battery one. In most cases we can reuse the existing wiring and mounting points, then add new alarms where the law now requires them.
Hardwired interconnected alarms run on mains power with a battery backup. They’re the most robust option and suit new builds, major renovations and homes with good roof space access.
10-year lithium alarms with wireless interconnection talk to each other by radio signal. They suit homes where running new cable is difficult, such as units with concrete ceilings, homes with no ceiling cavity access or lowsets with raked ceilings. They’re quick to install and create very little mess.
Plenty of homes end up with a mix: hardwired alarms where the old ones were, plus wireless-compatible units that link to them. That only works if the brand and model support it, so it pays to plan the whole system rather than buying alarms one at a time.
Where the alarms need to go
Placement is where a lot of DIY-fitted battery alarms fall short. The Queensland rules include positioning requirements that keep alarms away from dead air spaces and airflow that can stop smoke reaching them. In practice that means keeping alarms clear of the corner where the wall meets the ceiling, and away from light fittings, air conditioning vents and ceiling fan blades.
Raked ceilings, stairwells, and bedrooms with a ceiling fan in the centre all need a bit of thought. We work through each room on site and position alarms so they comply and actually do their job. If a compliant position isn’t possible in a particular spot, the rules have alternatives, and we’ll explain what we’ve done and why.
Can I install the alarms myself?
If you choose 10-year lithium alarms that don’t connect to mains power, a homeowner can install them. You’ll still need the right number, the right type and the right positions, and they must be interconnected.
Hardwired alarms are different. Any work on mains wiring, including swapping an existing hardwired alarm, must be done by a licensed electrician. Unlicensed electrical work is illegal in Queensland and NSW, and it can also cause problems with insurance if something goes wrong later.
What landlords and sellers need to know
If you’re leasing a property, the requirements already apply to you, and they have since 2022. Landlords also have ongoing obligations to test and clean smoke alarms and replace any that are faulty or nearing the end of their life, including within 30 days before the start of a new tenancy or a renewal. Our guide to landlord electrical obligations in Queensland covers this in more detail, and our rental property electrical service is set up to work with property managers.
If you’re selling, you’ll need to declare on the property transfer paperwork that compliant alarms are installed. Leaving it to the last week before settlement is a stress nobody needs.
How to get ready before 2027
With the deadline close, electricians across South East Queensland are getting busier. A few practical steps:
- Check what you have. Look at the back of each alarm (or the label on the side) for the type, the manufacture date and the standard it meets. Any alarm older than 10 years needs replacing regardless.
- Count your rooms. Bedrooms, connecting hallways and every storey. Most three-bedroom single-level homes need more alarms than people expect.
- Book early. A written quote lets you plan the cost and timing.
A typical house takes a few hours. We test every alarm once it’s installed, check that interconnection works from every unit, and leave you with the paperwork. If we spot anything else worth knowing about while we’re in the roof or at the switchboard, we’ll tell you, but there’s no pressure to do more than the alarms.
You can read more about how we handle this work on our smoke alarm installation page, or get in touch if you’re in the Gold Coast, Brisbane, Logan or Northern Rivers area. For the official detail, the Queensland Government publishes smoke alarm guidance online, and the Electrical Safety Office at electricalsafety.qld.gov.au is a good starting point for anything related to electrical safety at home.
Safety note: electrical work in Queensland and NSW must be done by a licensed electrician. This article is general information, not advice for your specific property. If something looks or smells wrong, switch off at the main switch if it’s safe to do so and call an electrician.