Queensland smoke alarm laws, and which deadline is actually yours
By Daniel Carmont, licensed electrical contractor Lic# 92489
Nuvolt Electrical Solutions · 19 September 2026 · 8 min read
Queensland has the strictest domestic smoke alarm law in the country, and it did not arrive all at once. It came in three stages, in 2017, 2022 and 2027, and the stage that binds you depends on what you do with the property, not on what sort of house it is. That is why so many people are certain it does not apply to them yet, and are wrong.
I am a licensed electrical contractor on the Sunshine Coast (Lic# 92489) and we fit these every week. This is the plain version: which deadline is yours, what actually counts as compliant, and roughly how many alarms an ordinary house ends up needing.
Three dates, and how to tell which is yours
Work down this list and stop at the first one that describes you.
You built the house, or did a substantial renovation, from 1 January 2017 onward. You have had to comply since then. If it was done properly at the time, you are likely already there.
You rent the property out, or you have sold it, at any point since 1 January 2022. You have had to comply since then. This is the stage most people miss, because the obligation attached when the lease or the sale happened, not on some future date.
None of the above, you just live in your own home. 1 January 2027 is yours. That is the final stage and it sweeps up every remaining domestic dwelling in Queensland.
So the common belief that "2027 is ages away" is only true for owner occupiers who have not sold or leased since 2022. If you are a landlord, your deadline is nearly five years in the past.
What counts as a compliant alarm
There are five conditions and an alarm has to meet all of them. Failing any one makes it noncompliant no matter how new it is.
The five conditions
1. Photoelectric. It must use a photoelectric sensor and must not contain an ionisation sensor. Ionisation alarms, the older technology, cannot be used. Photoelectric alarms respond earlier to the slow smouldering smoke that actually kills people in house fires, and they false alarm less near kitchens.
2. Compliant with AS 3786:2014. The Australian Standard. Any alarm sold for this purpose should state it on the packaging and the unit.
3. Interconnected with every other required alarm. When one detects smoke, they all sound. This can be done with hardwired interconnection cable or wirelessly by radio between compatible alarms. This is the condition that catches most older houses, because they have several perfectly good standalone alarms that do not talk to each other.
4. Hardwired to 240V with battery backup, or powered by a nonremovable 10 year battery. Both are legitimate. But if the home already has hardwired alarms, the replacements must also be hardwired, and that is licensed electrical work.
5. Less than 10 years old. Sensors degrade. The manufacture date is printed on the back of every unit. Plenty of homes are relying on alarms that expired years ago and nobody has looked.
Where they go, and how many that means
The locations are set by the legislation, not by preference:
In every bedroom. Every one, not just the main one.
In hallways connecting bedrooms to the rest of the home. Where bedrooms open onto living space instead of a hallway, the alarm goes between the bedrooms and the rest of that storey.
On every storey, including storeys with no bedrooms at all, positioned on the most likely path out of the house.
There are also placement rules about distance from corners, ceiling fans and air conditioning outlets. Those are where well meaning DIY installs quietly fail: the alarm is there, it is the right type, and it is in a spot the standard does not accept.
In round numbers, a three bedroom single storey house usually needs four alarms, three bedrooms plus the hallway. A four bedroom two storey house is commonly six or seven. Most older homes we walk into have one or two standalone alarms, so the gap is normally larger than people expect, and it is the reason a like for like swap of the one that is chirping does not get you there.
If you rent the property out
Your obligation started on 1 January 2022 and applies at the start of any new tenancy or renewal. If you lease a property in Queensland and it does not have compliant interconnected photoelectric alarms, that is a live problem now, not a 2027 one.
There is an ongoing duty as well as the installation. Landlords must test and clean each alarm within 30 days before the start or renewal of a tenancy, and replace any alarm that fails or reaches its 10 year age limit.
Tenants have their own duties during the tenancy, essentially testing and cleaning periodically and replacing flat batteries where the alarm takes them, and telling the lessor when an alarm is faulty. What a tenant cannot do is fix a noncompliant system. That is the owner's job.
If you are selling
Also 1 January 2022. Once the owner signs a contract to sell, the home must have compliant alarms, the buyer is told in writing whether they are fitted, and the seller declares it on the Form 24 transfer.
The practical risk is timing. Non compliance discovered during a contract becomes a conveyancing problem at the worst possible moment, with a settlement date already locked in and both sides under pressure. If a sale is anywhere on your horizon, it is far cheaper and calmer to sort the alarms before the property is listed than under contract deadlines.
If you simply live in your own home
1 January 2027, and there is no further stage after it. Every remaining domestic dwelling, including houses, townhouses and units.
There is no means test, no exemption for older homes and no grandfathering for alarms that were compliant under the old rules. A hardwired ionisation alarm fitted in 2015 was fine then and will not be then.
Worth saying plainly: the reason this law exists is that interconnection is what wakes you when the fire starts two rooms away. The 2027 date is a deadline, but the alarms are not a paperwork exercise.
Caravans and motorhomes
Easy to miss: from January 2027 the requirement extends to Queensland registered caravans and motorised caravans as well. If you have a van you sleep in, it is in scope.
What you can legally do yourself
You can fit battery powered wireless interconnected alarms yourself. They are designed for it, and provided you get the type, the positions and the interconnection right, that is a legal path to compliance.
You cannot touch anything hardwired. Connecting or replacing a 240V alarm is licensed electrical work. And remember condition four: if the house already has hardwired alarms, the replacements must be hardwired too, so the DIY route closes off entirely in most homes built since the 1990s.
The failure we see most is not wiring though, it is compliance by appearance. Alarms bought at the hardware shop, fitted in sensible looking spots, not interconnected or not positioned to the standard, and the owner believing the job is done. It looks right on the ceiling and it does not meet the law.
If your alarm is chirping right now and you are trying to work out whether it just needs a battery, start with why your smoke alarm is beeping, which tells you how to read the date off the back and fix it yourself where you can. If you want the whole house assessed and brought up to the standard, that is our smoke alarm installation page, and at a paid visit if one is needed we will date every existing alarm and tell you exactly what the layout requires.
Common questions
When do Queensland smoke alarm laws apply to my home?
It depends on what you do with the property. New builds and substantial renovations from 1 January 2017. Any property sold or leased from 1 January 2022. Every remaining domestic dwelling from 1 January 2027. Most people who think 2027 is theirs are right, but landlords and anyone who has sold since 2022 were caught nearly five years ago.
What makes a smoke alarm compliant in Queensland?
Five things, all of them. It must be photoelectric with no ionisation sensor, comply with AS 3786:2014, be interconnected with every other required alarm so they all sound together, be hardwired to 240V with battery backup or run a nonremovable 10 year battery, and be less than 10 years old. Failing any one makes it noncompliant however new it is.
How many smoke alarms does a Queensland house need?
One in every bedroom, one in hallways connecting bedrooms to the rest of the home, and at least one on every storey including storeys without bedrooms. In round numbers a three bedroom single storey house usually needs four, and a four bedroom two storey house commonly six or seven. Most older homes have one or two, so the gap is usually bigger than people expect.
Do I have to replace smoke alarms that still work?
Yes, if they do not meet all five conditions. An ionisation alarm has to go regardless of age, standalone alarms that are not interconnected do not comply however new they are, and any alarm over 10 years old from its date of manufacture must be replaced. There is no grandfathering for alarms that were legal under the old rules.
What are a Queensland landlord's smoke alarm obligations?
Compliant interconnected photoelectric alarms have been required since 1 January 2022 at the start of any new tenancy or renewal, so it applies now rather than in 2027. Landlords must also test and clean each alarm within 30 days before a tenancy starts or renews, and replace any alarm that fails or reaches 10 years old.
Can I install interconnected smoke alarms myself?
Battery powered wireless interconnected alarms, yes, provided you get the type, positions and interconnection right. Anything hardwired to 240V is licensed electrical work, and if the home already has hardwired alarms the replacements must also be hardwired, which closes off the DIY route in most homes built since the 1990s. Note that wireless interconnection is usually proprietary, so alarms from different brands will generally not talk to each other.
Do caravans need smoke alarms in Queensland?
From January 2027 the requirement extends to Queensland registered caravans and motorised caravans, so a van you sleep in is in scope.
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