Smoke Alarm Installation Cost Calculator
Estimate the cost of installing hardwired, interconnected smoke alarms. Enter how many you need, most Australian states now require photoelectric, interconnected alarms, and many require them hardwired, which is a licensed electrical job.
Your smoke alarm installation details
Usually one per bedroom, hallway and level.
Your estimate sits within the typical range.
Smoke alarm laws differ by state and are tightening, most now require photoelectric, interconnected alarms in every bedroom, hallway and level. Rental and sale compliance rules are stricter again.
💰 Ways to save
- In an older home, wireless-interconnected lithium alarms avoid costly new wiring while still meeting the rules.
- Do all alarms in one visit, the electrician's call-out fee is a fixed cost spread across the job.
- Check your state's exact requirement before buying, fitting the wrong type means doing it twice.
How we estimate this
Installing smoke alarms in Australia typically costs around $150 to $250 per hardwired, interconnected alarm installed in 2026 when replacing existing units, so a typical home of four alarms often lands around $600 to $1,200. New wiring runs add more.
Pricing reviewed: November 2026.
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Pricing reviewed November 2026. Indicative Australian costs, not a quote.
Understanding smoke alarm installation costs in Australia
Installing smoke alarms in Australia typically costs around $150 to $250 per hardwired, interconnected alarm installed in 2026 when replacing existing units, so a typical home of four alarms often lands around $600 to $1,200. New wiring runs add more.
Most states now mandate photoelectric, interconnected alarms, and the rules are strictest for rentals and at sale. Where no cabling exists, 10-year lithium wireless-interconnected alarms meet the rules for less than running new wiring.
Frequently asked questions
How much does it cost to install smoke alarms in Australia?
Roughly $150 to $250 per hardwired interconnected alarm installed in 2026, so about $600 to $1,200 for a typical four-alarm home. Wireless lithium alarms can be cheaper where no wiring exists.
Do smoke alarms have to be hardwired in Australia?
It varies by state, but most now require photoelectric, interconnected alarms. Many require hardwiring in new builds, while 10-year lithium wireless-interconnected alarms are accepted in many existing homes. Check your state's rules.
Are you a electrician / smoke alarm compliance business?
Everyone on this page is working out what smoke alarm installation costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.