2024 Local Business Award Winner – Georges River
No job too small – we love them!
Fixed-price quoting – no surprises
Fully licensed & insured
Proudly local – Penshurst based
Licensed Electrician · Penshurst, St George
Smoke Alarm Installation, Testing & Repairs in St George
Working smoke alarms are the cheapest life insurance your home will ever have. Saints Electrical installs, tests, replaces and repairs hardwired and 10-year battery smoke alarms for homes, landlords and property managers across St George and the Sutherland Shire.
Fixed-price quotes. Same-week availability for most jobs. Licence 399328C.
Your local smoke alarm electrician
We're a small, award-winning electrical business based in Penshurst, and smoke alarms are some of our favourite jobs. They're quick, they matter, and they're the kind of "small job" a lot of electricians won't call back about. We always do.
Whether one alarm has started chirping at 3am, you've just bought an older home, or you manage a rental that needs its annual check, we'll tell you what you actually need, quote it upfront, and leave your ceilings as clean as we found them.
Smoke alarm services
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New Smoke Alarm Installation
Hardwired 240V alarms with battery backup, or sealed 10-year lithium alarms where running cable isn't practical. Placed to meet NSW requirements for your layout.
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Smoke Alarm Replacement
Alarms older than 10 years, yellowed units, or old ionisation alarms swapped for modern photoelectric alarms. Most hardwired swaps take minutes per alarm.
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Interconnected Smoke Alarms
Link every alarm in the home so they all sound together, using hardwired or wireless interconnection. Ideal for two-storey homes and long floor plans.
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Smoke Alarm Testing & Checks
We test every alarm, check manufacture dates, clean sensors, replace backup batteries and tell you if anything is close to expiry.
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Smoke Alarm Repairs
Beeping, chirping, false alarms or a hardwired alarm that's gone dead. We find the cause, fix it, and only replace what's needed.
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Landlord & Rental Compliance
Annual checks, battery changes and replacements for rental properties, with paperwork for your records. See our property managers service.
NSW smoke alarm rules, in plain English
NSW law says every home where people sleep must have working smoke alarms that meet Australian Standard AS 3786. That covers houses, units, rentals, granny flats and even caravans.
The legal minimum:
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At least one smoke alarm on every level of the home, even levels without bedrooms
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Alarms in the hallway near the bedrooms. If bedrooms are in different parts of the house, each area needs its own alarm
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No hallway? The alarm goes between the bedroom area and the rest of the house
That's the minimum. Fire and Rescue NSW recommends an alarm in every bedroom too, and that's what we suggest for most families. New builds and major renovations have stricter building code requirements, and we'll check exactly what applies before we quote.
Landlords have extra obligations. In a rental, the landlord or agent must check alarms every year, change removable batteries every year, repair a faulty alarm within 2 business days, and replace alarms within 10 years of manufacture. Hardwired alarms must be repaired or replaced by a licensed electrician. We handle all of this for property managers and landlords across the St George area.
Rules summarised from Fire and Rescue NSW and NSW Fair Trading. We'll confirm what applies to your property on site.
Set a reminder
Check your smoke alarms every 6 months
An alarm that isn't working is just a ceiling decoration. Dust, insects and flat backup batteries can all stop an alarm from sounding, and you won't know until you test it.
We recommend a full check every 6 months, and there's an easy way to remember: do it when the clocks change. In NSW that's the first Sunday in October, when daylight saving starts, and the first Sunday in April, when it ends.
A Saints smoke alarm check includes:
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Testing every alarm with the test button and confirming it sounds
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Checking the manufacture date on each unit and flagging anything near 10 years old
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Cleaning the sensor chamber and vents
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Replacing removable backup batteries
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Confirming interconnected alarms all trigger together
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A quick written summary of what we found
Which smoke alarm is right for your home?
Hardwired vs 10-year battery. Hardwired alarms run off your home's 240V power with a battery backup, so they're the most reliable long-term option and they must be installed by a licensed electrician. Sealed 10-year lithium alarms need no wiring and suit spots where running cable is difficult, such as some units and older homes with limited roof access.
Photoelectric vs ionisation. Photoelectric alarms are better at picking up the slow, smouldering fires that are common in homes, and they give fewer false alarms from cooking. If your home still has older ionisation alarms, we recommend upgrading to photoelectric when they're due for replacement.
Interconnected alarms. When one alarm detects smoke, every alarm in the house goes off. In a two-storey home, that's the difference between hearing an alarm downstairs and sleeping through it. We can interconnect existing homes with either hardwired or wireless links, so there's usually no need to cut extra holes in walls.
Smoke alarm beeping or chirping?
A single chirp every 30 to 60 seconds usually means the backup battery is low. In a hardwired alarm, it can also mean:
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The alarm has reached the end of its life, which is common in sealed-battery units
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Dust or insects are inside the sensor
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The alarm has lost mains power, often after a tripped circuit
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One faulty unit is setting off the others in an interconnected system
If you've changed the battery and it's still chirping, the alarm itself probably needs replacing. Hardwired alarms are connected to 240V power, so please don't pull them apart yourself. Give us a call and we'll sort it, usually in one visit. If you're seeing nuisance tripping on the circuit too, we can check your switchboard and safety switches while we're there.
How it works
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Book or call
Book online or call 02 9538 7032. Tell us how many alarms you have and what's going on.
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Fixed-price quote
We give you a clear price before any work starts. What we quote is what you pay.
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Done properly
We install or repair, test every alarm, clean up, and walk you through how to test them yourself.
Why St George homeowners choose Saints
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Licensed NSW electrician, licence 399328C, fully insured
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Based in Penshurst, so we're never far away
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Fixed-price quotes, no surprises on the day
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Same-week availability for most smoke alarm jobs
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Boot covers and drop sheets, every time
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2024 Georges River Local Business Award winner
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5-star Google rating
★★★★★
"Chris helped install a new smoke alarm and assisted with some other bits and pieces around the home. He was very polite, knowledgeable and explained what he was doing at all times."
MetatroN BlooM, Google review
How much does smoke alarm installation cost?
Every home is different, so we don't use one-size-fits-all pricing. The cost depends on how many alarms you need, whether they're hardwired or 10-year battery, and how easy it is to run cable through your ceiling. Swapping an existing hardwired alarm is usually the quickest job. Adding new hardwired alarms or interconnecting the whole home takes a little longer.
Before any work starts, we'll give you a fixed-price quote. What we quote is what you pay, with no surprise charges after the job.
Already booking us for another job? We're happy to add a smoke alarm check while we're there.
Smoke alarm FAQs
How many smoke alarms do I need?
NSW law requires at least one on every level of your home, in the hallway near the bedrooms or between the bedroom area and the rest of the house. If bedrooms are spread out, each area needs its own. Fire and Rescue NSW also recommends one in every bedroom. We'll tell you the exact number for your layout.
What are the smoke alarm rules in NSW?
Alarms must meet AS 3786 and be installed on every level of any home where people sleep. Rentals have extra rules: annual checks, yearly battery changes, repairs within 2 business days and replacement within 10 years of manufacture.
How often should smoke alarms be checked?
Press the test button monthly, and have a full check every 6 months. The easy reminder is when the clocks change in April and October.
How long do smoke alarms last?
About 10 years. The manufacture date is printed on the back of each alarm. Replace it at 10 years even if it still beeps when tested, because the sensor degrades over time.
Do I need an electrician to install a smoke alarm?
For hardwired alarms, yes. They connect to 240V power and must be installed or replaced by a licensed electrician. Battery-only alarms can be fitted by anyone, but we can make sure they're in the right spots.
Why is my hardwired smoke alarm chirping with a new battery?
Usually the alarm has reached the end of its life, the sensor is dirty, or it has lost mains power. If a new battery doesn't stop it, the unit likely needs replacing.
Can you replace my old alarms without new holes in the ceiling?
In most cases, yes. Modern hardwired alarms can usually use the existing wiring and mounting position, and we patch and tidy anything that needs it.
Do you work with landlords and property managers?
Yes. We coordinate access with tenants, complete annual checks and replacements, and provide documentation for your records. See our property managers page.
Smoke alarm installation across St George and the Sutherland Shire
We install and repair smoke alarms in homes across the Georges River area and the Sutherland Shire, including:
St George
Penshurst
Hurstville
Mortdale
Peakhurst
Oatley
Lugarno
Beverly Hills
Kingsgrove
Narwee
Riverwood
Allawah
South Hurstville
Kogarah
Blakehurst
Connells Point
Kyle Bay
Carss Park
Sans Souci
Ramsgate
Sutherland Shire
Como
Jannali
Sutherland
Kirrawee
Gymea
Miranda
Sylvania
Caringbah
Cronulla
Menai
Illawong
Get your smoke alarms sorted
No job too small. One chirping alarm or a full home upgrade, we'll quote it upfront and get it done properly.