Walk down just about any street, and you’ll see them. They’re mounted above doors, angled over driveways, set up in front of stores, and even along streets. Of course, we’re talking about security cameras. They’re ubiquitous. But does all of this surveillance actually make us any safer? Or is it just a way to collect footage for after the fact?
The research on visible security cameras has a clear answer—as long as you adhere to one key condition.
The Psychology Behind Security Cameras as a Deterrent
To understand deterrents, it helps to think like a burglar. Most property crime isn’t done by a calculating or professional cat burglar. It’s often much more opportunistic. The underlying framework comes from criminologists who call it “rational choice therapy.” It’s basically the idea that even the most impulsive offenders make a quick calculation before they act, running through a few key questions:
- How long will this take?
- What are the chances I’ll get caught?
- And is there an easier target nearby?
One thing that can change that calculation quickly is, you guessed it, a visible security camera. According to the U.S. National Institute of Justice, the certainty of being caught deters crime significantly more than the severity of punishment.
A camera that’s been strategically placed at eye level—in plain sight—raises the perceived risk instantly. If someone knows someone else is watching and that their actions will be recorded, it gives them pause.
This is also why hidden cameras aren’t as effective. Hiding the camera largely defeats the purpose. While a camera that can’t be seen may well record the incident for evidence later, it doesn’t do anything to prevent it.
A Closer Look at Security Research
The most-cited study comes from the University of North Carolina at Charlotte. Researchers surveyed convicted burglars about how they decided which properties to target. Around 60% said seeing a visible security system (e.g., cameras) directly encouraged them to move on and choose a different location.
Sixty percent isn’t marginal! Homes with visible cameras are much less likely to be burglarized than homes with cameras that are hidden or not there at all.
Surprisingly, these benefits can extend well beyond break-ins. One landmark meta-analysis from the UK (from the Journal of Experimental Criminology) found that cameras reduced overall crime by 16%. The results were even more impressive around parking lots, where crime dropped by 51%.
Vandalism, public disturbances, and vehicle crimes all showed measurable declines when security measures were visible.
More recent research out of China found that urban areas with denser security networks experienced steeper drops in crime than areas with fewer cameras. Again, the reduction was more notable when those cameras were visible and public-facing.
Canadian research has found similar results. In 2002, Hamilton, Ontario, for example, was the first in Canada to use public CCTV (closed-circuit television surveillance system) in high-crime areas. The surveillance footage has been a key tool for providing evidence.
Toronto and Montreal have both significantly increased their camera networks in the last few years. While the laws are not without controversy, law enforcement has found that using these cameras both deters crime and leads to faster resolution, benefiting our communities.
Looking over 40 years of research, both globally and in Canada, a McMaster University systematic review consistently found that CCTV is a meaningful crime-prevention tool that works particularly well for drug, property, and vehicle crime.
All that said, there is one caveat: cameras are most effective against rational crime that’s economically motivated. Violent or impulsive offenses, according to research, show more mixed results. Intense emotions appear to override the risk calculations cameras can impart. Some studies also indicate a displacement effect. That is, the crime shifts to a nearby area without security cameras rather than just disappearing altogether.
That said, for a typical Canadian homeowner who’s concerned about possible break-ins, package theft, vandalism, or other property crimes, the case for using visible security cameras to deter crime is strong.
The Importance of Making It Visible
Again, having cameras isn’t enough. Where and how you mount them can determine whether they can discourage or just document after the fact. So, where should you place them?
1) The front door is obvious. About 34% of break-ins happen right at the front entrance. Mount your camera at about 7 to 9 feet, angled slightly downward, so it captures features clearly. Check your feed to ensure there are no blind spots.
2) The back door and fence line are also important lines to defend. Why are back doors targeted? Because they’re out of sight. Make sure you position the camera for the entire fence line, not just the door. That way, you’ll catch the approach too.
3) Attached garages are the largest openings to most homes. Placing a camera visible above the garage indicates your entire house is covered, and it can also capture any vehicle activity in the driveway or approaching from the street.
4) Side entries and ground-floor windows are often overlooked, and burglars count on these blind spots. Making sure they’re in the camera’s view helps close any remaining perimeter gaps.
Research supports using a layered security approach. That is, the visible cameras are only part of the security system, which also includes motion-activated lighting and alarm signage. Each element compounds the risk calculation for a would-be intruder. Good lighting raises the risk of being seen, visible cameras increase the odds of being caught, and monitoring signs boost the odds of backup arriving before they can get away.
Visible Security Cameras: A True Deterrent?
The research is consistent. Yes, visible cameras do deter property crime. Not perfectly or in every scenario. But they do so measurably, putting the odds in your favor. Just remember, the camera needs to be visible to both record what happens and, perhaps more importantly, discourage it from happening in the first place.
At the end of the day, the question isn’t if visible cameras work. It’s how well they’re placed, aimed, and integrated into your entire system.
If you aren’t sure if your security system is doing everything it can, we’re here to help. Every home has different potential entry points, sight lines, and vulnerabilities. At Home-Alarms.ca, we help homeowners design a protection plan that’s built around their specific needs. Contact us at 1-855-518-4458 to speak with one of our friendly security experts.