Every Australian state and territory requires working smoke alarms in all residential properties, but the specific requirements differ. Queensland has the strictest rules — from 2027, all homes must have interconnected photoelectric smoke alarms in every bedroom, hallway, and on each level. Most other states require hardwired, interconnected alarms in new builds and renovations, with battery alarms still permitted in some existing homes.
Overview
Smoke alarms save lives — they are your earliest warning in a house fire and give your family critical minutes to escape. Australian legislation mandates smoke alarms in every home, but requirements have been progressively tightened, particularly around the type of alarm (photoelectric vs ionisation), power source (hardwired vs battery), and interconnection (all alarms sounding simultaneously). Many homeowners don't realise their smoke alarms may no longer be compliant, especially if they're selling, leasing, or renovating. A licensed electrician can assess your property, recommend the right alarms, and ensure full compliance with your state's specific legislation.
When you need this service
- ✓Your smoke alarms are over 10 years old and need replacing (all alarms have a 10-year lifespan)
- ✓You're selling or leasing a property and need to meet compliance requirements
- ✓You want to upgrade from battery alarms to hardwired, interconnected alarms
- ✓You're building or renovating and need smoke alarms installed to current standards
- ✓Your existing alarms are chirping, false-alarming, or not working
How it works
- 1
Compliance Assessment
An electrician inspects your existing smoke alarms, checks their age, type, and placement, and identifies what's needed to meet your state's current legislation.
- 2
Alarm Selection & Positioning
Photoelectric smoke alarms are selected and positioned according to AS 3786 and state requirements — bedrooms, hallways, living areas, and each level of the home.
- 3
Installation & Interconnection
Alarms are hardwired to mains power with battery backup and interconnected so that when one alarm detects smoke, all alarms sound simultaneously throughout the home.
- 4
Testing & Certification
Every alarm is individually tested and the interconnection is verified. You receive documentation confirming compliance, including alarm locations, brands, and installation dates.
How much does it cost?
Hardwired smoke alarm installation in Australia costs $120 to $200 per alarm, including the alarm unit, wiring, and labour. A typical 3-bedroom home requires 4 to 6 alarms, bringing the total to $500 to $1,200. Replacing existing hardwired alarms (where wiring is already in place) is cheaper at $80 to $130 per alarm. Wireless interconnected alarms are an alternative where running cables is impractical, costing $100 to $180 per unit. Many electricians offer package deals for full-home compliance upgrades.
Australian regulations
Smoke alarm requirements are governed by AS 3786 (Smoke alarms using scattered light, transmitted light or ionisation) and state-specific legislation. Queensland (under the Fire and Emergency Services Act) requires all homes to have interconnected photoelectric alarms in every bedroom, hallway, and on each level — full compliance required by 1 January 2027. NSW requires hardwired alarms on each level in properties sold or leased. Victoria requires working alarms on each level. All states mandate photoelectric type alarms in new installations (ionisation alarms are being phased out). All smoke alarms must be replaced every 10 years regardless of condition.