Every Queensland home is different, so there isn't one fixed number of smoke alarms that suits every property.
In most homes, you can work out what you may need by looking at three things: your bedrooms, the connecting areas between them and the rest of the home, and each storey.
Usually, the connecting area is the hallway that links the bedrooms to the rest of the home. If there is no hallway, a different connecting location applies.
A typical 3-bedroom, single-storey home with one common connecting hallway may have 4 alarm locations.
1. Count your bedrooms
Queensland requires a smoke alarm inside each bedroom.
So if your home has three bedrooms, start your count at three alarm locations. If it has four bedrooms, start at four.
Then look at how those bedrooms connect to the rest of your home.
2. Add the connecting area or areas
If bedrooms open onto a hallway that connects them to the rest of the dwelling, that hallway is also a required smoke-alarm location.
That means a typical four-bedroom home with one common connecting hallway may have 5 alarm locations — one in each bedroom and one in the hallway.
If your bedrooms are in separate parts of the house and use different connecting hallways, more than one hallway alarm may be required.
3. Check each storey
If a storey contains bedrooms, apply the bedroom and connecting-area rules above.
If a storey has no bedrooms, Queensland requires at least one smoke alarm on the most likely path of travel to an outside exit.
So a two-storey home with all four bedrooms upstairs may, for example, have four bedroom alarms, one common upstairs hallway alarm and another alarm downstairs on the likely path to the outside exit.
Which example looks most like your home?
These examples are a simple starting point. Your actual number depends on your home's layout.
| Example layout | Example alarm locations |
|---|---|
| 3 bedrooms + 1 common connecting hallway | 4 |
| 4 bedrooms + 1 common connecting hallway | 5 |
| 4 bedrooms + 2 separate connecting hallways | 6 |
| 4 bedrooms upstairs + 1 common upstairs hallway + bedroom-free downstairs | 6 |
| 5 bedrooms + 2 separate connecting hallways | 7 |
Examples only: actual requirements depend on your home's layout. Split levels, unusual floorplans, bedrooms without hallways or multiple bedroom areas may require individual consideration.
Before you choose your Home Kit
Queensland's required smoke alarms must be interconnected so that when one activates, they all activate. EasyFit Home Kits arrive pre-paired and wirelessly interconnected.
If an existing required smoke alarm is 240V hardwired, its replacement must also be an appropriate 240V smoke alarm. Electrical work must be carried out by a licensed electrician.
Compliant photoelectric alarms powered by a non-removable 10-year battery can be self-installed where battery-powered alarms are appropriate for the dwelling.
Frequently asked questions
How many smoke alarms does a 3-bedroom Queensland house need?
If all three bedrooms are on one storey and connect to the rest of the home through one common hallway, a typical layout may have 4 alarm locations: one in each bedroom and one in the connecting hallway. Different layouts can require more.
How many smoke alarms does a 4-bedroom Queensland house need?
A typical single-storey four-bedroom home with one common connecting hallway may have 5 alarm locations. Separate hallways or another storey can increase the number.
Do I need a smoke alarm downstairs if all my bedrooms are upstairs?
If the downstairs storey has no bedrooms, at least one smoke alarm is required on the most likely path of travel from that storey to an outside exit.
What if my bedrooms do not open onto a hallway?
Where a bedroom does not connect by a door to a hallway, the required alarm location is in the part of the storey between that bedroom and the rest of the dwelling.
Does every room need a smoke alarm?
No. Queensland specifies particular required locations rather than requiring an alarm in every room. Bedrooms, relevant connecting areas and each storey's layout determine the required locations.
This guide is intended to make Queensland's smoke alarm requirements easier to understand. Actual locations depend on the layout of your dwelling, and unusual layouts may require individual consideration.
Queensland Fire Department — Smoke Alarms
Queensland Fire Department — Smoke Alarm FAQs
Queensland legislation — Building Fire Safety Regulation 2008
EasyFit last reviewed the Queensland regulatory information in this guide against the above sources on 23 August 2026.
