A property owner near Nisku Industrial Park (T9E) found someone had set up camp in his equipment yard overnight, sleeping between two idle excavators. He called Canadian Shield Security's mobile patrol unit instead of approaching the trespasser himself, and a licensed guard confirmed the person had left before the crew arrived for the morning shift.
That is the safest version of this situation. Trespassers are unpredictable, and Alberta law is quite specific about what a property owner can and cannot legally do alone, which makes the wrong first move often more costly than the trespass itself ever was.
This guide covers exactly what to do the moment you spot a trespasser on your Edmonton property, what the Trespass to Premises Act actually allows you to do, and when to bring in a licensed guard or call the police instead.
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FEATURED SNIPPET -- DIRECT ANSWER If you find a trespasser on your Edmonton property, keep your distance and avoid confronting them directly. Call 911 if you feel threatened, or call a licensed security company to dispatch a guard. Under Alberta's Trespass to Premises Act, only a peace officer or the owner's authorized representative may apprehend a trespasser. |
A Trespasser Is Anyone on Your Property Without Permission or a Valid Reason
A trespasser is anyone entering or remaining on your property without your permission and without a lawful reason to be there. In Edmonton, this ranges from someone cutting across a fenced lot, to a person sleeping in a doorway after hours, to a former contractor who never returned their gate key.
It also includes someone who had permission once but was told to leave and refused. A guest who will not go home, a delivery driver who wanders past a posted gate, or a customer who stays in a closed store after hours all cross into trespass the moment they ignore a clear request to leave.
Properties near Whyte Avenue (T6E) and other nightlife-adjacent commercial strips see a specific pattern: late-night wandering onto private lots or loading areas after bars close, which businesses often catch only on camera the next morning rather than in the moment.
Industrial and construction sites face a different version entirely. Large, partially fenced sites near Nisku and Leduc are easy to wander onto by accident, but also easy to occupy deliberately overnight, which is why many site managers pair scheduled on-site guard checks with clear signage at every entry point.
Residential properties are not exempt either. A homeowner in Windermere or Terwillegar dealing with someone repeatedly cutting through a side yard, or a condo board in Mill Woods (T6K) dealing with a non-resident sleeping in a stairwell, both face the same legal trespass, even though neither situation involves a business.
Alberta's Trespass to Premises Act Defines What You Can and Cannot Do
Under the Trespass to Premises Act (Alberta), RSA 2000, c T-7, Section 5(1) allows a trespasser to be apprehended without a warrant by a peace officer, or by the owner or an authorized representative of the property, which can include an SSIA-licensed guard acting on your behalf. You can review the full legislative text through Trespass to Premises Act (CanLII).
That authority comes with a strict limit. Section 5(2) of the Act requires that anyone other than a peace officer who apprehends a trespasser must deliver that person to a peace officer as soon as practicable, not detain them indefinitely or handle the matter privately.
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AMBER -- LEGAL LIMIT Force is limited too. Alberta property owners may use reasonable, proportionate force to remove a trespasser or make a citizen's arrest, consistent with the defence of property provisions in the Criminal Code of Canada. Excessive or deadly force is not permitted unless there is an imminent threat to life. |
Notice matters as much as the law itself. Under Section 2(3) of the Act, a property owner can give notice not to trespass verbally, in writing, or through posted signage, and that notice is what turns simple presence on your land into an offence under the Act.
This is worth knowing before an incident happens, not during one. A property with posted signage at every entrance has a far easier path to a trespass charge than one relying only on a verbal warning given in the moment, since signage proves notice was given in advance rather than after the fact.
What to Do the Moment You Spot a Trespasser
The sequence below applies whether the trespasser is on a residential lot, a commercial property, or an industrial site.
1. Keep your distance and observe rather than approach; note what the person looks like, what they are doing, and any vehicle involved.
2. Call 911 immediately if you feel threatened, if the person appears armed, or if they are attempting to break into a building.
3. If there is no immediate danger, call a licensed security company to dispatch a guard or mobile patrol unit to assess and, if appropriate, ask the person to leave.
4. Do not attempt a citizen's arrest alone unless you are trained to do so safely; leave apprehension to a licensed guard or peace officer wherever possible.
5. If a guard or you do apprehend the trespasser under the Act, deliver them to a peace officer as soon as practicable, as required by law.
6. Document the incident with photos, timestamps, and a written note while details are fresh, for both a police report and your own records.
Most trespassing calls resolve at step three. A licensed guard confirming your property line and asking someone to leave ends the situation in the large majority of cases without ever reaching the point of an arrest.
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GREEN -- KEY INSIGHT Do not rely on memory alone for a repeat trespasser. A documented pattern, with dates, times, and descriptions, is what turns a frustrating one-off into a case Edmonton Police can actually act on. |
Property insurers increasingly ask for an incident log when a trespassing pattern precedes a break-in or vandalism claim. A guard's timestamped report from each visit gives you that log without extra effort on your part.
Trespasser Response Time and Cost in Edmonton
Response time and cost depend on whether the situation needs an immediate dispatch or fits into a scheduled patrol route already covering your property. The table below reflects typical Edmonton figures.
Trespasser Response: Time and Cost in Edmonton
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Service |
Typical Response Time |
Typical Cost |
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Mobile Patrol Rapid Response |
15-30 minutes |
$28-$45 per hour |
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On-Site Guard Deployment |
30-60 minutes |
$32-$48 per hour |
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Scheduled Patrol Check (existing route) |
Included in route |
Custom quote, often monthly |
Canadian Shield Security uses GPS dispatch to route the closest available officer, which is why Downtown Edmonton (T5J) and South Edmonton (T6H) properties typically see the fast end of these windows, while Nisku and Leduc-area sites (T9E) may sit closer to the upper end depending on the time of day.
Properties that see repeat trespassing, such as vacant lots or partially fenced construction sites, often find a scheduled patrol route cheaper than repeated one-off dispatch calls, since the same visit can cover several nearby properties in one pass.
When to Call Edmonton Police vs a Security Guard
Call Edmonton Police Service directly, or 911 in an emergency, whenever a trespasser is armed, aggressive, attempting entry into a building, or you simply do not feel safe assessing the situation on your own property yourself.
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AMBER -- TRUST / LIMITATION Call a security guard first when the situation is lower-risk: someone on a fenced lot after hours, a person asleep in a doorway, or a repeat trespasser you want documented rather than confronted. SSIA-licensed guards can apprehend a trespasser under the Act, but they must hand that person to police as soon as practicable, and they are not authorized to lay criminal charges themselves. |
Canadian Shield Security's 32+ licensed officers cover Edmonton and surrounding communities 24 hours a day, including nights, weekends, and public holidays, with a free site assessment to help you decide which response level fits your property, alongside our alarm response coverage if your site is also alarmed.
Every officer completes a background check before deployment, which matters given that a guard responding to a trespasser call may need to exercise judgment about force, safety, and when to step back and wait for police.
Preventing Repeat Trespassing on Your Property
Preventing repeat trespassing starts with clear notice. Posted "No Trespassing" signage at every entry point gives you the legal notice required under the Act and makes any future trespass charge far easier for police to prove in court.
Pairing signage with CCTV monitoring gives you footage that supports both a police report and a guard's incident log, and a scheduled patrol route adds a physical presence that signage alone cannot.
Property managers in Glenora, Oliver, and Windermere increasingly pair perimeter lighting upgrades with a documented post orders checklist, so every patrol visit checks the same gates, fence lines, and known trespass points rather than relying on a guard's memory of the property.
Winter adds a seasonal wrinkle. Vacant or partially built sites become more attractive for shelter once temperatures drop toward -40C, so many Edmonton property owners increase patrol frequency specifically through the coldest months rather than keeping a flat schedule year round.
Conclusion
A trespasser on your Edmonton property is unsettling, but the legal path is clear: keep your distance, call the right service for the risk level, and let a licensed guard or police handle apprehension under the Trespass to Premises Act.
Canadian Shield Security serves Edmonton 24/7 with SSIA-licensed guards and a free consultation for every property. Call 1 (800) 326-7879 the moment you spot a trespasser, or to set up ongoing patrol coverage before the next one shows up.
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SOFT CTA Canadian Shield Security serves Edmonton 24/7. Free consultation -- no hidden fees. Call 1 (800) 326-7879. |
Frequently Asked Questions
Can a security guard legally remove a trespasser from my property?
Yes, within limits. Under the Trespass to Premises Act (Alberta), the owner or an authorized representative, which includes an SSIA-licensed guard acting on your behalf, may apprehend a trespasser without a warrant. The guard must then deliver that person to a peace officer as soon as practicable rather than detaining them indefinitely.
How much does mobile patrol response to a trespasser cost in Edmonton?
Mobile patrol response to a trespasser call in Edmonton typically runs $28-$45 per hour, with most calls resolved within a single visit. Canadian Shield Security offers a free site assessment so you can decide whether a one-time dispatch or ongoing patrol coverage fits your property better, with no hidden fees added later.
Does Canadian Shield Security respond to trespassing calls in Leduc or Nisku?
Yes. Canadian Shield Security dispatches guards to trespassing calls across Edmonton and surrounding communities, including Leduc, Nisku, Beaumont, St. Albert, and Sherwood Park. Our GPS dispatch system routes the closest available SSIA-licensed officer, so response times stay consistent whether your property sits downtown or near an industrial park.
Can I use force to remove a trespasser in Alberta?
Alberta law permits reasonable, proportionate force to remove a trespasser or make a citizen's arrest, but excessive or deadly force is not allowed unless your life is in imminent danger. If you are unsure whether a situation justifies physical intervention, call a licensed guard or police instead of acting alone.
What is the fine for trespassing in Alberta?
Under the Trespass to Premises Act, a trespassing conviction in Alberta can result in a fine and, in more serious cases involving night-time loitering or repeat offences, additional penalties. Property owners should still document the incident and involve police or a licensed guard rather than relying on the fine alone as a deterrent.
