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Alarm Systems

Alarm Systems near you

An alarm system is the detection and response layer of a house: sensors that notice an entry, a panel that decides what it means, and something that happens next, whether that is a siren on the eaves, a push notification or a monitoring centre working through a call list. Australian homes are typically single storey and wide, with several external doors, sliding doors onto a patio or deck and a garage that connects straight into the house, so the sensor plan matters more than the brand on the panel.

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Two things separate a system that stays armed from one that gets abandoned. The first is detection chosen for how the household actually lives, including pets, shift work and teenagers coming home late. The second is the contract, if monitoring is involved, because the monitoring term and its cancellation conditions outlive the hardware in most households.

On LokalMatch you set out the property, the number of doors and windows, whether you want monitoring and your postcode in one request, and alarm installers working in that area reach out to you. They pay for those requests; LokalMatch takes no part in the work itself, sets no prices and does not vet, rank or endorse the businesses that respond, so the licence check and the contract reading remain yours.

Alarm system types: local sirens, self-monitored and professionally monitored

  • Local or audible-only: the siren and strobe fire and that is the whole response, which relies on someone nearby caring enough to look or call.
  • Self-monitored: the panel pushes an alert to a phone app, so response depends entirely on you having signal, seeing it and deciding what to do.
  • Professionally monitored: signals go to a monitoring centre that follows an agreed call list and can arrange a patrol response, usually under a contract with a fixed term.
  • Wired: detection cabled back to the panel, steady and hard to interfere with, easiest to install during a build or renovation when ceilings and walls are open.
  • Wireless: battery-powered detectors talking to the panel, quick to retrofit into a finished brick-veneer or slab house, at the cost of a battery schedule.
  • Hybrid: a wired core with wireless devices added where cable cannot reasonably be run, which is how most retrofits in older homes end up.

Signs an existing alarm system has reached the end of its life

  • The panel beeps or reports a fault that nobody has been able to clear, so the household has stopped arming it.
  • Detectors trip for no reason, especially in the small hours, and the response has become to disarm rather than to investigate.
  • The keypad is worn to the point where the used digits are obvious to anyone standing at the door.
  • The system still dials out over a landline that has been disconnected, or over a network service that has been switched off.
  • Nobody living in the house knows the master code, or the only person who does has moved out.
  • Replacement detectors or a replacement panel board are no longer available, and the installer can only offer second-hand parts.
  • The siren has never been tested, or neighbours say they have never heard it.

What happens on alarm installation day

The installer confirms the plan on site before drilling anything: panel location out of sight of the entry but reachable for service, keypad at the door the family actually uses, siren high and hard to reach, detectors angled so that a person crossing the room passes across the sensor's field rather than walking straight at it. In roof spaces the work usually happens early in the day, because a Queensland or inland roof cavity in summer is genuinely dangerous by mid-afternoon.

Cabling then gets run, devices are mounted and the system is programmed: zones named in plain language so an alert says which door, entry and exit delays set to how long you really take to reach the keypad, part-arm modes for night-time, and separate user codes for each person rather than one shared number. Pet-tolerant detectors and mounting heights are adjusted around the animals in the house if there are any.

The last hour is testing and teaching. Every detector should be walk-tested with you present, the siren sounded briefly, the standby battery and mains connection verified, and, if monitored, a signal sent right through to the monitoring centre and acknowledged. You should leave with administrator access, the code list in your own hands and a written schedule of what was installed.

False alarms and what actually causes them in Australian homes

False alarms are the reason most abandoned systems were abandoned. They are rarely mysterious, and a competent installer can design around nearly all of them, so raise each of these at the quote stage rather than after the third two-in-the-morning call.

  • Insects and spiders walking across a detector lens or nesting inside a housing, which is common in summer and after rain.
  • Geckos, possums and rodents in roof spaces and wall cavities triggering internal detection.
  • Pets, especially cats that climb, where a pet-tolerant detector mounted at the wrong height still sees them.
  • Air movement from ceiling fans, evaporative coolers, split-system outlets and curtains lifting near a detector.
  • Sunlight through a west-facing window landing directly on a detector in the late afternoon, and heat build-up in a closed-up house.
  • Storm activity, mains flicker and flat standby batteries, which produce fault signals rather than intrusion signals but disturb the household just the same.
  • Doors and gates that no longer sit square, so a reed switch drifts out of alignment with its magnet as the frame moves through the seasons.

Licensed alarm installers and the licensed electrician behind the power supply

Who may install an alarm for payment is set by your state, not by the Commonwealth. Western Australia is the clearest published example: WA Police Licensing Services describes a Security Installer licence issued under the Security and Related Activities (Control) Act 1996, with a class covering the installation, maintenance and repair of security alarms and CCTV for security purposes, and applicants for that class must have completed an approved training course in technical security. New South Wales lists the security industry among its licences and directs it to NSW Police. Victoria has a Private Security Act 2004 in force, and Queensland licenses security providers under its own legislation. Ask the installer which class of licence they hold and check it with that state's regulator.

The electrical side is not negotiable anywhere in Australia. Energy Safe Victoria's position is blunt: always hire a licensed electrician, and electrical work is not a do-it-yourself job even for small tasks such as changing powerpoints or light switches. In New South Wales you need an electrical licence or certificate before doing any electrical wiring work, regardless of what the job costs. In Western Australia all electrical work must be carried out by a person who holds the relevant electrical licence, it is unlawful for an unlicensed person to carry out electrical work including modifications to fixed wiring, and for work other than maintenance the electrical contractor must give you an electrical safety certificate within 28 days.

In practice that means a plug-in transformer for the panel is one thing, but a hardwired supply, a new circuit or any alteration at the switchboard is an electrician's job, whether or not the alarm company sends the electrician themselves. Ask in advance which part of your quote is electrical work and who will be doing it.

Monitoring contracts, consumer guarantees and getting out of a bad agreement

Monitoring is a service, and services carry consumer guarantees. The ACCC states that service providers must carry out all services using an acceptable level of care and skill, that services must be fit for any stated purpose, and that they must be supplied within a reasonable time where no time frame was agreed. Those rights cannot be signed away: the ACCC says the basic rights covered by consumer guarantees cannot be taken away by anything a business says or does.

The ACCC also distinguishes between problems. A service has a major problem when it creates an unsafe situation, or has one serious problem or several smaller ones that would have stopped someone buying the service had they known beforehand; in that case the consumer can cancel the contract and get a refund, or keep the contract and pay a lower price that takes the problem into account. For a minor problem the business must be given the chance to fix it for free, and if it cannot or will not do so within a reasonable time, the consumer's remedies escalate.

Read the term and the exit conditions before you sign, and keep every signal report and service record, because a monitoring service that repeatedly fails to act on alarms is a service failure you can evidence. Note also that an extended warranty on the hardware is optional: the ACCC says businesses must not pressure consumers into buying one or mislead them into paying for rights they already have automatically.

Keeping an alarm system reliable: batteries, testing and code hygiene

  • Test the system on a set date each year, walking every detector and letting the siren sound briefly so you know what the neighbours will hear.
  • Replace the panel's standby battery on the schedule the installer gives you, and do not wait for the fault light: a flat standby battery turns the next blackout into an outage for your alarm too.
  • Change wireless detector batteries as a batch rather than one at a time, and note the date on the inside of the cover.
  • Vacuum or brush detector housings and clean lenses before summer, when insects and spiders are most active.
  • Remove codes for anyone who no longer lives at or works on the property, including former cleaners, tradespeople and house-sitters.
  • Confirm the monitoring call list every year, because phone numbers and the people behind them change faster than the hardware does.
  • After any storm, blackout or renovation, re-arm and test rather than assuming the system came back the way it was.

Alarm Systems: frequently asked questions

Can an alarm installer do the electrical work themselves?

Only if the person doing it holds the relevant electrical licence. Energy Safe Victoria says electrical work is never a do-it-yourself job, New South Wales requires an electrical licence or certificate for any electrical wiring work regardless of cost, and Western Australia treats unlicensed electrical work, including modifications to fixed wiring, as unlawful. Many security companies employ or subcontract a licensed electrician; ask who it will be and, in Western Australia, expect an electrical safety certificate within 28 days for work other than maintenance.

How many sensors does an average Australian house need?

There is no standard number, and a quote built on a count rather than a walk-through is a warning sign. What matters is covering the ways in that suit your house: external doors including the internal garage door, sliding doors, accessible windows, and the internal paths anyone must cross to reach the bedrooms or the living area. A wide single-storey home with several entries needs a different plan from a narrow two-storey terrace.

Will my pets set the alarm off?

Not if the system is designed around them. Pet-tolerant detectors, careful mounting height and angle, and part-arming the areas the animals do not use will handle most households. Tell the installer at the quote stage what animals you have, how big they are and whether they climb, because retrofitting around a cat that walks along the back of the lounge is much harder than planning for it.

What happens to my alarm during a blackout or internet outage?

A panel with a healthy standby battery keeps running for a period after the power goes, but anything that reports over the internet needs the modem and network gear to be up as well, and they usually are not. Ask the installer how alarm signals leave the house, what the backup path is, and how long the standby battery is expected to last. Storm season is the time you find out whether that answer was accurate.

Is it worth keeping a very old alarm panel and just adding new sensors?

Sometimes, if the panel is sound, parts are still available and the installer can show you it reports reliably. It stops being worth it when the panel only communicates over a service that no longer exists, when replacement boards are unobtainable, or when the fault list never clears. At that point the money goes further on a current panel than on nursing the old one through another year.

Sources

  1. WA Police Force: Security licence application requirements
  2. WA Police Force: Licensing Services (Security)
  3. Energy Safe Victoria: Electrical DDIY, don't do it yourself
  4. Government of Western Australia: Having electrical work done
  5. ACCC: Consumer guarantees
  6. ACCC: Repair, replace, refund, cancel
  7. ACCC: Warranties

Written by the LokalMatch editorial team. Last reviewed 14 September 2026. How we write and check our guides

What affects the cost of alarm system

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Number of cameras, sensors or devices
  • Wired or wireless installation
  • Monitoring and subscription fees
  • Running cables through finished walls or ceilings
  • Size and layout of the home
  • Integration with other smart home or network equipment

How to compare alarm installers before you hire

  • Choose an installer who looks at your home in person and explains where cameras, sensors or access points should go.
  • Ask whether monitoring is included, whether it's optional and what the contract length and cancellation terms are.
  • Find out whether you'll own the equipment or lease it, and whether it works with other systems.
  • For hardwired systems, make sure any electrical work is done by a licensed electrician.
  • Ask how they'll set up passwords, apps and network security, and make sure you get the admin access.

Questions to ask alarm installers before you hire

  • Will I own the equipment, or is it leased or tied to a contract?
  • Is monitoring required, and what are the cancellation terms?
  • Where will the cameras point, and will they capture my neighbours' property?
  • Who will have access to the video and the account?
  • Will this work with my existing Wi-Fi, locks or smart home devices?
  • What warranty covers the equipment and the installation?

Alarm system permits and local rules

Some alarm system work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

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