Replace before it's too late.
Licensed Perth electricians replacing hardwired photoelectric smoke alarms to WA law. Compliance certificate included. Same-week bookings across the metro — from a single unit swap to a full-home upgrade.
The honest price range.
There's no flat rate — and any electrician who quotes one over the phone without seeing the property is guessing. Here's the realistic range for Perth homes in 2026, and exactly what moves the figure.
Includes the AS 3786:2014 photoelectric unit, hardwiring, placement check, system test, and (where needed) compliance documentation.
Multi-alarm jobs in a single visit lower the per-unit cost. Final figure depends on ceiling access, wiring condition, and home layout.
The unit
itself.
AS 3786:2014 Photoelectric
A $40 device protecting everything you own.
In Western Australia, the rules around smoke alarms aren't optional. The consequences of getting it wrong show up at the worst possible moments — a failed pre-settlement inspection, a delayed tenancy, an insurance claim pushed back, or worse.
We replace smoke alarms across Perth every week — family homes in Joondalup, rentals in Mandurah, older properties in Fremantle, newer builds out in Ellenbrook. The question we hear most: "What's this actually going to cost me?"
This guide gives you the honest answer, the factors that move the price, and exactly what a proper quote should include — so you can make a confident decision the first time.
Is your alarm expired?
Enter the year your hardwired alarm was installed. We'll show you where you sit under WA's 10-year rule.
We'll show you whether your alarm is past its WA-mandated 10-year service life.
$180–$280 per alarm for a standard hardwired unit; whole-home upgrades $650–$1,400+.
Only a licensed electrician can legally install or replace a 240V hardwired smoke alarm in WA.
Photoelectric, hardwired, interconnected alarms are the WA standard — ionisation is out.
Rentals and sale properties must meet WA smoke alarm laws before lease or settlement.
A proper quote covers assessment, wiring check, testing, and compliance docs — not just a unit swap.
A $40 device. Powered, reliable and safe.
Five things that move the figure.
Every Perth home is different. Below are the five practical factors that determine the final quote — what to expect, what to flag when you book, and where homeowners get caught out.
Alarm type & tech.
240V hardwired photoelectric alarms compliant with AS 3786:2014 are the WA standard. Interconnected alarms — one triggers, all sound — are mandatory for homes built after 1 May 2015, and cost slightly more in hardware and labour.
Number of alarms.
Older Perth homes often had a single alarm in the hallway. Current standards require alarms in every corridor associated with bedrooms and on every storey — even storeys without bedrooms. Most homes: 3–5 alarms. Replacing them in a single visit drops the per-unit cost.
Ceiling height & access.
A 2.4 m ceiling is quick work. A 3.5 m raked ceiling above a stairwell is not.
- High or raked ceilings — common in newer Perth builds
- Stairwell voids — platform ladder territory
- Second-storey installs — cable runs through cavities
- Restricted roof space — older Fremantle & inner-suburban
Wiring condition.
In homes untouched in 15+ years, we sometimes find degraded cabling, missing RCD protection on the smoke alarm circuit, or non-compliant connections that need correcting before the new unit goes in. We'd rather find it and tell you upfront than ignore it.
Reason for the replacement.
The job's the same — the documentation isn't. If you're replacing for a pre-settlement inspection, new tenancy, or property handover, you'll need a formal compliance certificate. That's included in our pricing — just flag it when you book.
The rules, in plain english.
Smoke alarm requirements in Western Australia are set by the Building Regulations 2012 and enforced by the Department of Fire and Emergency Services (DFES). These aren't our rules — they're WA law.
What costs Perth homeowners real money.
Every week we hear the same myths — and every week they end up costing someone a failed inspection, a denied insurance claim, or a delayed settlement. Here's the truth.
I'll just change the battery.
A fresh battery keeps the alarm from chirping at you — it doesn't restore a sensor that's lost sensitivity, and it doesn't reset the 10-year clock. An expired alarm with a fresh battery is still an expired alarm.
It still beeps when I press the button.
The test button only confirms the speaker and battery are alive. It does not test whether the sensor can actually detect smoke. We've seen alarms that beep loud in a test — and fail completely in a smoke chamber.
Bunnings sells them for $40 — why does an electrician cost more?
You can buy the unit yourself. What you can't legally do in WA is connect it to 240V mains power. Our pricing covers the compliant unit, hardwiring, placement check, interconnection testing, and compliance documentation.
Can my handyman do it?
No. Under WA law, only a licensed electrical contractor can install or replace hardwired smoke alarms. A handyman can change a battery in a stand-alone unit — but they can't legally touch your 240V circuit.
What each actually covers.
Not every "replacement" is created equal. Here's the difference between a battery swap, an illegal DIY job, and a fully compliant professional install.
The work, up close.
A look at the unit, the install, the smoke chamber test, and the chaos we're protecting Perth homes from. Every job. Every alarm. Every test.
From call to compliant in 4 steps.
Most jobs are booked, completed, and certified within the same week. Here's exactly what happens between your first call and the moment we hand you the paperwork.
Free Quote Call
Tell us the property type, number of alarms, and reason — sale, rental, owner-occupier. We'll give you a clear price range on the phone, and a fixed quote on site.
Site Assessment
Our electrician checks ceiling access, wiring condition, existing placement, RCD protection, and confirms the right alarm count under current code.
Install & Test
We hardwire each AS 3786:2014 photoelectric unit, test every interconnection as a system, and confirm the backup battery is functional.
Certify & Hand Over
You receive a compliance certificate suitable for settlement agents, property managers, and insurers. 12-month workmanship guarantee included.
What a proper replacement often uncovers.
A licensed replacement is also a mini safety audit. When our electricians are in your ceiling, here's what we frequently find — and tell you about, plainly.
- No RCD Protection Common in homes that haven't had a switchboard upgrade — the smoke alarm circuit isn't protected by a safety switch.
- Degraded Cabling Heat, age, or rodent activity in the ceiling space — sometimes invisible until the alarm is removed.
- Mixed-Age Interconnected Systems One new alarm wired to four expired ones — none will trigger correctly when it counts.
- Incorrect Placement Too close to kitchens, bathrooms, or in dead-air corners where smoke won't reach the sensor in time.
- Alarms That Look Fine — But Aren't Communicating A common issue when only one unit has been replaced over the years. The system fails silently.
Why Perth chooses ACS Electrical.
Smoke alarms aren't a sideline for us — they're one of the most important safety jobs we do, because the consequences of cutting corners are real. Powered, reliable and safe — every install.
Fully Licensed WA Electrician
Every job. No apprentices left unsupervised. Every install signed off by a qualified contractor.
Clear, Fixed Quote
Before any work starts. No hidden extras, no surprise additions at the end of the job.
Compliance Docs Included
For sales and rental jobs — at no extra charge. The paperwork settlement agents and property managers need.
Full System Test
Before we leave — every alarm, every interconnection. Tested as a system, not in isolation.
12-Month Workmanship Guarantee
On every install. If anything we touched isn't working as it should, we come back at no charge.
No Call-Out Fees
For booked appointments. Free, obligation-free quotes — phone, message, or in person.
Licensed, insured, accountable.
Three live licences — held by Auswest Contracting Services Pty Ltd, trading as ACS Electrical. Verifiable, on every job.
- § 10 — Local Proof
Honest answers.
The questions we hear every week from Perth homeowners, landlords, and conveyancers.
Anything not covered? Call us and ask — we'll tell you straight.
Your local Perth team.
Headquartered in Joondalup. Same-week bookings usually available across the Perth metro — north, south, east, and central. If your suburb isn't listed, call us and we'll confirm.
North
- City of Joondalup
- City of Wanneroo
- Stirling · Wangara
- Alkimos · Balcatta
- Osborne Park
South
- Melville · Cockburn
- Canning · Rockingham
- Kwinana · Mandurah
East
- City of Swan
- Kalamunda · Mundaring
- Midland · Perth Hills
- Eastern foothills
West & Central
- Perth CBD · Nedlands
- Subiaco · Vincent
- Town of Cambridge
Sort your smoke alarms — this week.
Whether you're preparing for settlement, turning over a rental, or you've just realised your alarms are pushing 12 years old — getting it done properly is faster and cheaper than you'd think.