How Much Does Smoke Alarm Installation Cost in Perth? (2026 Prices)

If you're selling, renting out or leasing a home in Western Australia, mains-powered smoke alarms aren't optional — they're a legal condition of the sale or the tenancy, and settlement agents and property managers check. Even if you're staying put, a ten-year-old alarm is at the end of its life, and the cheap battery unit from the supermarket doesn't meet the standard.

This guide covers what smoke alarms cost to install in Perth in 2026, exactly what WA law requires, where alarms have to go, what's done on the day and how to keep the cost down.

A quality mains-powered photoelectric alarm — Clipsal, Brooks, Cavius, PSA Lifesaver, Red or Quell — is $50–$110 at trade. The rest is the electrician's time in the roof, the wiring, the test and the certificate. Alarms are life-safety equipment: we fit the brands whose bases and batteries we can still get in ten years.

These come from the Building Regulations and are enforced by local councils and, for tenancies, through the Residential Tenancies Act. The short version:

• Mains-powered. Before a home is sold (title transfer), rented out or hired (including short-stay), it must have smoke alarms permanently connected to the mains supply. Battery-only alarms don't meet the requirement except in the narrow case below.
• Not more than 10 years old. Every alarm carries a manufacture date. If it's past 10 years or past its expiry date, it must be replaced. This catches a lot of Perth homes built or renovated in 2010–2015.
• Australian Standard AS 3786. The alarm has to comply, which every reputable brand does. Fire services recommend photoelectric alarms — they respond faster to the smouldering fires that kill people in their sleep.
• Where they go. In every corridor or hallway associated with a bedroom (or between the bedrooms and the rest of the house if there's no hallway), and on every storey, including storeys with no bedrooms. Class 1b homes — small boarding houses and some short-stay properties — also need one in every bedroom.
• Interconnected where there's more than one — but only for dwellings whose building permit was applied for on or after 1 May 2015. Older homes with multiple alarms don't have to interconnect, though it's cheap to do with wireless-interconnect alarms and we recommend it for two-storey homes.
• Battery alarms only where wiring is impossible. Where there's genuinely no hidden space to run a cable — a concrete ceiling, some flat roofs — a 10-year non-removable lithium battery alarm is permitted. "Hard to get to" isn't the same as impossible.
• Landlords must maintain them. Alarms in a rental have to be kept in working order, so property managers test at the start of each tenancy and replace out-of-date units.

Selling or renting soon? Our WA electrical compliance checklist covers smoke alarms, RCDs and the certificate together.

1. Check what's there. Date of manufacture on each alarm, type (photoelectric or ionisation), whether it's mains or battery, and whether the positions meet the rules.
2. Plan the positions. Ceiling-mounted, at least 300 mm from walls and corners, away from air-conditioning vents, ceiling fans and the kitchen and bathroom doorways (steam and cooking cause false alarms).
3. Run the wiring. For a new position, a cable from the nearest lighting circuit through the roof space to a new ceiling point; for a replacement, the existing base and wiring are checked and reused if sound.
4. Fit and interconnect. Alarm bases mounted, alarms clipped on, interconnection wired or paired wirelessly where required.
5. Test. Every alarm tested on the button and with test smoke where needed, interconnection confirmed, the lighting circuit's RCD protection checked.
6. Certify. Your Electrical Safety Certificate within 28 days, and a compliance certificate for the settlement agent or property manager if you've asked for one.

Replacing a single alarm takes under an hour; a new position with a cable run is one to two hours; three interconnected alarms is about half a day.

• Photoelectric, not ionisation. Photoelectric alarms detect the large smoke particles from smouldering fires (furniture, bedding, electrical faults) much earlier and cause fewer cooking false alarms. Fire services across Australia recommend them; we only fit photoelectric.
• Mains-powered with a 10-year backup battery. Required for a sale or tenancy, and it means no 2am chirping from a flat 9 V battery.
• Interconnected for two-storey homes and larger single-storey homes, so a fire in the theatre room wakes the bedrooms. Wireless-interconnect alarms make this cheap to retrofit.
• Brands we fit: Clipsal 755 series, Brooks, Cavius, PSA Lifesaver, Red and Quell. All AS 3786 compliant, all with spares available in Perth.

Smart alarms that send an alert to your phone exist and work, but check they're AS 3786 certified and mains-powered before buying one for a rental.

• Replacement vs new position. Reusing an existing base and cable is the cheap job; a new cable run is the dearer one.
• Roof access. A walkable roof space is quick. Flat roofs, concrete ceilings and the ground floor of a two-storey home take longer or need surface conduit.
• Number of alarms. The first one carries the visit; each extra is much cheaper.
• Interconnection. Wireless-interconnect alarms cost more per unit but save cabling between them.
• Existing wiring condition. Old two-wire lighting circuits without an earth, or a lighting circuit with no RCD, may need attention at the same time.
• Bundling. Smoke alarms, RCDs and the compliance certificate in one visit is the cheapest way to get a home ready for sale or a tenancy.

Tell us how many alarms you have, whether they're mains or battery, single or two-storey, and whether it's for a sale or a tenancy — that's usually enough for a fixed price over the phone.

• Fixed price before we start, $0 call-out fee.
• Same-day or next-day for settlement and tenancy deadlines where we can.
• Photoelectric alarms with 10-year backup batteries, tested, with the Electrical Safety Certificate.
• Licensed electrical contractor EC15449, 300+ five-star Google reviews. See our smoke alarm installation service.

We install smoke alarms across the Perth metro — Joondalup, Scarborough, Belmont, Melville, Armadale, Baldivis and everywhere between.

• Check the dates first. Look at the manufacture date on the back of each alarm; if they're under 10 years old and mains-powered, you may only need a test, not a replacement.
• Replace all the alarms at once. The first alarm carries the visit cost; the rest are cheap.
• Bundle with RCDs and the certificate if you're selling or renting.
• Don't buy alarms yourself unless you're sure they're mains-powered and AS 3786 certified — we've had to replace plenty of online purchases that weren't.
• Keep them clean. A vacuum over the vents twice a year prevents dust false alarms and extends the life of the unit.

Need smoke alarms installed in Perth?

Call 0422 117 839 or request a free quote online. Fixed price, $0 call-out fee, photoelectric alarms with the certificate included. Read more about our smoke alarm installation service.