Queensland Smoke Alarm Laws FAQ

Yes. If one alarm activates, all alarms must sound throughout the dwelling. This ensures occupants are alerted regardless of where the fire starts.

Yes. Interconnection may be:

• Hardwired, or
• Wireless.

Wireless interconnection is widely used in existing homes where installing new wiring would be difficult or costly.

Not always. Smoke alarms must be either:

• Hardwired to the mains power supply, or
• Powered by a non-removable 10-year battery.

Yes, if they have a non-removable 10-year battery and meet all other requirements. Older replaceable-battery alarms generally do not satisfy current requirements when replacing legally required alarms.

Yes. Many owner-occupiers mistakenly believe the rules only apply to rental properties. From 1 January 2027, virtually all Queensland residential dwellings are affected.

If you are an owner occupier you have until 1 January 2027 to comply with the new Queensland smoke alarm regulations.

Yes. Rental properties and properties being sold have been required to meet the newer standards before the 2027 deadline. Queensland landlords were required to comply from 1 January 2022.

Only if they are compliant. The alarm must:

• Be photoelectric.
• Comply with AS 3786.
• Be interconnected.
• Operate correctly.
• Be less than 10 years old.

The new legislation affects class 1a buildings (e.g. houses/townhouses) and class 2 buildings (e.g. units/apartments). It does not include short-term stay dwellings such as motels, dormitories, caravans or other buildings covered by the National Construction Code (NCC).

Photoelectric smoke alarms complying with AS 3786. Ionisation alarms alone are no longer acceptable for compliance upgrades.

Smoke detector: An electronic fire-protection device that automatically senses smoke and issues a signal to a central fire alarm control panel — used in commercial and industrial settings.

Smoke alarm: A self-contained smoke-sensing device that issues an audible or visual alarm from the device itself, or sounds all interconnected units when triggered — used in residential dwellings.

Photoelectric smoke alarms detect visible particles of combustion. Research indicates they are generally more effective across a wider range of fires experienced in homes — responding quicker to smouldering fires and the dense smoke produced by foam-filled furnishings or overheated PVC wiring.

Ionisation smoke alarms tend to respond faster to the smoke produced by flaming fires. Photoelectric smoke alarms tend to respond faster to the smoke produced by smouldering fires. Queensland law now requires photoelectric alarms as they provide better protection across the range of fires most likely to occur in homes.

Check:

• Manufacturing date stamped on the label on the side or rear of the alarm.
• Replacement date (if recorded).

If it is more than 10 years old, it must be replaced.

Yes. Registered caravans and motorhomes must be fitted with photoelectric smoke alarms with a 10-year non-removable lithium battery.

There is no fixed number. The number depends on:

• Number of bedrooms.
• Number of levels.
• Hallways.
• Building layout.
• Travel paths to exits.

While the centre of the room is preferred, it is not a requirement. On the ceiling, alarms must be:

• 300mm from covers or lights.
• 400mm from anything that may blow air (air conditioner, ceiling fan blade edge).
• At least 300mm from a corner of a ceiling and a wall.

There are special requirements for sloping ceilings and ceilings with exposed beams.

Yes, in some circumstances. Ceiling mounting is generally preferred. Wall mounting has minimum distance requirements from ceilings and corners.

Maybe. This is one of the most common questions electricians receive. The answer depends on:

• Height of the bulkhead.
• Ceiling configuration.
• Whether smoke movement is restricted.
• Installation requirements in the Building Code and relevant standards.

A site-specific assessment is often required.

Battery-powered alarms: Generally yes.

Hardwired alarms: Must be installed by a licensed electrician. All 220–240v wiring must comply with AS/NZS 3000.

Not necessarily. Smoke alarms can be interconnected any way that allows all alarms to sound when one activates — physically wired together or using wireless technology (or a combination of both). Wireless technology is available for both 240-volt (mains powered) and battery-operated alarms.

If your dwelling was built before 1997 it is likely you won’t have a hardwired smoke alarm. In this case you can upgrade your entire dwelling using wireless alarms with a 10-year non-removable battery.

Usually not for hardwired interconnection. Interconnection compatibility varies between manufacturers and models. Always check manufacturer specifications before mixing brands.

Smoke alarms should be tested once a month using the test button. All Australian Standard smoke alarms have a test button on their exterior. If you cannot reach the button easily, use a broom handle. Some brands offer a wall-mounted control switch for testing, locating, and silencing alarms.

Maintenance should be carried out once a month and includes:

• Testing by pressing the test button.
• Cleaning with a duster or vacuum cleaner (dust, debris and bugs can interfere with operation).
• Replacing removable batteries annually, if applicable.

If you are a landlord leasing a Queensland dwelling, you have an obligation to carry out this maintenance within 30 days of a new or renewal of tenancy.

Removable batteries should be replaced every 12 months. A chirping sound may indicate a flat battery. Wireless smoke alarms with a non-removable 10-year lithium battery do not require battery replacement. Rechargeable batteries (recharged by mains power) also do not require replacing.

Not specifically under Queensland smoke alarm legislation. However:

• Compliance reports are commonly requested.
• Electrical work may require electrical certification.
• Real estate agents often seek documentary evidence of compliance.

Manufacturers will generally only warrant their product if it has been installed, operated and maintained in accordance with the manual or operating instructions. Always keep your receipt as proof of purchase. Most warranty applications are requested online — if you choose an installer who is a warranty agent, the process is made much simpler and quicker.

Owner / Landlord is responsible for:

• Installing compliant alarms.
• Replacing expired alarms.
• Ensuring compliance.

Tenant is responsible for:

• Testing alarms.
• Cleaning alarms.
• Replacing certain batteries during the tenancy where applicable.
• Reporting faults.

Queensland landlords were required to upgrade smoke alarms in their leased properties by 1 January 2022.

Landlords must have smoke alarms tested, cleaned and batteries replaced (if removable) within 30 days before the start of a tenancy. Landlords must not remove a smoke alarm or battery (other than to replace it), or do anything to reduce the effectiveness of the alarm (e.g. paint it).

You do not need to be qualified or licensed to clean or test a domestic smoke alarm. Some real estate agents outsource smoke alarm maintenance to a specialist company. Tenancy rules permit entry for the purposes of complying with smoke alarm legislation.

Non-compliance can create issues involving:

• Property sales.
• Insurance claims.
• Fire investigations.
• Legal disputes after a fire.

When selling, smoke alarm compliance must be disclosed. Failure to disclose accurately may expose a seller to legal and contractual issues. A penalty of 0.15% of the contract price may be applied at settlement (see clause 7.8 of the REIQ contract).

Because that is exactly how they are designed to operate. When one alarm detects smoke, every interconnected alarm sounds simultaneously — ensuring occupants are alerted regardless of where they are in the dwelling.

Common causes:

• Cooking fumes.
• Steam.
• Dust.
• Insects.
• Aerosols.
• Incorrect placement near fans or air-conditioning vents.

Depending on the brand you choose, expect to pay between $140 and $220 for an electrician to supply and install a photoelectric, interconnected smoke alarm.

Carefully check the installer’s electrical licence and the terms and conditions of their warranty — including whether they offer warranty coverage for both the installation and the product. Where possible, choose an installer who is a registered warranty agent for the brand they install.