TL;DR: In an immediate threat or crime in progress, get to a safe place and call 000 without confronting the person. For prevention, check locks, escape routes, lighting and how help would be contacted. Evidence about opportunistic burglary cannot prove that occupancy signals or a barking device will stop a violent home invasion.
This guide provides general planning information from official police and safety-support sources. It is not an assessment of your personal threat, legal position or insurance requirements. For ongoing stalking or family violence, obtain an individual safety plan through 1800RESPECT or a suitable local support service.
What makes a deterrent effective?
A deterrent is intended to discourage an approach; a physical barrier, detector, notification and emergency response each have different functions. None guarantees that an incident will not occur. Choose measures around the actual entry, occupants and threat rather than assuming an alarm or an occupied appearance is the strongest layer in every situation.
For general burglary prevention, make physical access harder and improve visibility. If the concern involves someone who knows you, threats or forced entry while people are home, do not rely on a bluff about occupancy. The safety of the people inside takes priority over defending property or obtaining evidence.
What does occupancy research actually tell us?
The AIC research published in 2014 used interviews conducted in 2012 with 69 Western Australian detainees reporting a recent burglary. Their stated target choices provide context for opportunistic burglary. This was not a trial of electronic dog barking and cannot establish protection against violent or targeted home invasion.
Timer lights, collected mail and a trusted person checking the home may reduce obvious signs of absence. They do not prove someone is present, prevent forced entry or replace personal safety planning. Recorded sound is another possible cue; its effect on a specific person remains uncertain.
| Deterrent | What it does well | Where it falls short |
|---|---|---|
| Locks and window hardware | Make forced entry harder and slower. | They may not stop someone from testing the door first. |
| Sensor lighting | Removes cover on the approach. | Light alone does not always make the home sound occupied. |
| Cameras and doorbells | Record evidence and may deter visible approach. | Power, storage, network and active warning features depend on the exact model. |
| Barking or local alarm sound | Produces local sound when its sensor detects a suitable trigger. | No physical barrier or automatic call for help; placement and false triggers matter. |
| Neighbour awareness | Adds real human attention around the property. | Neighbours cannot watch every path at every hour. |
Protect the approach, not only the door
Many homes spend money on the front door while leaving the quiet path untouched: side gate, garage pedestrian door, rear laundry, bathroom window, shed path or carport. The approach is where the decision happens. If that route stays dark, silent and hidden, the best lock in the world is still being tested under better conditions for the offender.
Inspect your private access routes in daylight when it is safe. Check visibility, maintenance and lighting without entering a shared area or altering fixtures without permission. Do not go outside to survey a route during an active concern. Keep exits usable for everyone in the household.
Do cameras stop home invasions?
Some cameras provide motion notifications, lights, sirens or voice warnings as well as recording. Others mainly record. Compare the exact model and configuration: detection may occur before entry, while remote features need their specified power and connection. None of these functions establishes that a camera will stop a home invasion.
Use cameras, if appropriate, alongside suitable physical security and a clear response plan. Choose privacy settings and permitted positions carefully. A live notification is useful only if someone can receive it and act safely; a local sound is useful only where it can be heard. Neither should be presented as universally better.
Where K9-Alert fits
K9-Alert is an optional local sound device. A powered PIR sensor detects suitable movement within its unobstructed view, and the separate receiver plays barking if the radio link works. It does not detect through glass or metal, record video, identify an intruder or send a phone notification.
It cannot replace a secure door, monitored response, police reporting or a personal safety plan. There is no direct trial here showing it prevents violent home invasion. If the kit is already available, test it safely before use; new online orders depend on actual delivery and are not a solution for an emergency tonight.
Add local sound only where it fits your plan.
The sensor uses 3 AAA batteries or USB and the indoor receiver uses 4 AA batteries or USB. Place the sensor under cover on a permitted private route, then test power, radio, control and noise. No verified IP rating, pet immunity or whole-property coverage is claimed.
- A$95.00 buy-once kit with free Australian shipping.
- Check permissions: portable placement and fixed outdoor installation have different lease, strata and property requirements.
- Re-test after moving: a successful location does not establish performance at another door or shed.
What should renters and apartment households do?
Renters can start with reporting broken locks, moving keys out of sight and using existing permitted lighting. Check local rental and strata rules before adding or changing fixtures. Do not wedge a fire door or place a bar, chain or other barrier where it prevents a quick escape from inside.
For a no-drill version of the plan, read Best Alarm for Renters Australia and Apartment Security for Renters Australia.
What should you do after a recent scare?
If danger is current, use emergency services first. When safe, record observable damage or behaviour, preserve existing footage, report the incident and arrange necessary repairs. For a completed burglary, use the break-in checklist. Repeated threats need a response plan tailored to the situation, not merely a louder device.
The point is not to build a fortress. The point is to make your home a harder, louder and less predictable target than it looked yesterday.
Common questions about home invasion deterrents
What is the best home invasion deterrent?
There is no single device proven best for every situation. Plan physical security, usable escape routes, lighting and how help will be contacted. General burglary research does not establish protection against violent or targeted threats. For a known threat, seek individual safety planning; call 000 if danger is immediate.
Do cameras stop home invasions?
A camera may deter, notify, record or activate light and sound, depending on the model and setup. None guarantees that an intrusion will stop. Check power and connectivity, privacy and who receives alerts. Use appropriate physical security and an emergency plan rather than relying on any one camera or sound device.
Can K9-Alert replace locks or police reporting?
No. K9-Alert makes local sound after suitable motion detection; it does not block entry, identify a person, send a remote alert or contact police. Its intended occupancy cue is not proven protection from home invasion. Keep locks and exits appropriate, and report danger or an incident through the correct channel.
What should the household agree in advance?
Agree how to contact help, where a safe exit or waiting place may be, and what each person can do. Account for children, hearing, mobility and pets. Rehearse only in calm conditions; do not make a plan that depends on someone confronting an intruder or hearing a particular alarm.
| When | Do this | Do not do this |
|---|---|---|
| Right now: immediate danger | Seek safety and call 000 | Defend possessions or wait for a device to solve the threat |
| Tonight: safe again | Use existing locks, phone and a clear exit | Block a fire door or sole escape route |
| Tomorrow | Report, preserve evidence and arrange repairs | Publish accusations based on an unfamiliar car or person |
| Before the next night | Confirm contacts and suitable measures | Assume a new order or police attendance has a guaranteed time |
References
- Victoria Police, Prevent home burglaries
- Australian Bureau of Statistics, Crime Victimisation 2024-25
- Australian Institute of Criminology, The 'oldest tricks in the book' don't work!
Review an optional local sound layer.
K9-Alert provides local barking after suitable detection. It does not summon help, prevent forced entry or replace a personal safety plan. Prioritise the response your situation needs.