Construction Site Security in Surrey BC: Stop Theft Before It Starts
Construction Site Security in Surrey BC: Stop Theft Before It Starts
Written by Paul Thandi, Operations Manager, On Guard Security Ltd. — 10+ years in BC security · Updated September 2026
An active build is one of the hardest properties to protect. Tools, materials, fuel and machinery sit behind temporary fencing, access points change as the project moves, and for most of the night and weekend nobody is there. Construction site security closes that gap with licensed people who control access, patrol the site and write down what they find. This guide explains what security a construction site actually needs, how to secure it against theft, how on-site guards compare with mobile patrol, what drives the cost, and what to check before you hire a provider in Surrey and the Fraser Valley.
Key takeaways
A construction site is most exposed when the crew is gone: overnight, on weekends and over long weekends.
The three realistic options are a dedicated on-site guard, scheduled mobile patrol, or a hybrid of the two, and the right mix usually changes as the build progresses.
Guards work best as one layer alongside fencing, lighting, locked storage and good end-of-day habits, not as a replacement for them.
Written shift reports give you a record for insurance claims, disputes with subtrades and your own site-safety files.
In BC, both the security company and each guard must be licensed, and you can check any licence yourself online before anyone steps on your site.
Construction sites put a lot of resaleable property in one place and then leave it unattended. Power tools, copper wire, fixtures waiting to be installed, fuel and compact equipment are all easy to move and hard to trace. Early in a build there is often no permanent lighting, no wired alarm and no locked building envelope to put things inside.
The risk also follows a predictable schedule. The crew leaves in the late afternoon, the site sits empty until morning, and on a Friday that gap stretches to Monday. Statutory long weekends make it longer again. Anyone watching a site in Surrey, Cloverdale or South Surrey can see when it goes quiet. Construction site security is about taking that predictability away: somebody might be there, or might arrive at any time.
Theft is not the only loss. Vandalism, graffiti, dumping, damage to finished work and people using an empty site for shelter all cost time. The real expense of an incident is usually the delay: re-ordering materials, rebooking trades and pushing back inspections.
Most sites need four things covered, whatever the size of the project:
Access control. Only authorised workers, deliveries and subtrades enter, and someone logs who came and went. On larger sites this is a gate post during working hours; on smaller sites it may simply be a locked gate and a sign-in sheet.
After-hours presence. A guard on site or a patrol that visits at unpredictable times, so the site is never reliably empty.
Detection and response. Someone who notices an open gate, a cut fence, a propped door or a person who shouldn't be there, and acts: securing the area, calling the site contact, or calling police, fire or ambulance when needed.
Documentation. Written shift reports with patrol times, observations and incidents. This is what you hand your insurer or your client when something goes wrong.
Physical measures carry much of the load: solid perimeter fencing, lighting on laydown areas and entrances, lockable containers for tools and materials, and clear signage. Cameras can help you see what happened, but they rarely stop anything on their own. A guard adds judgment and a physical response to whatever technology you already have. On Guard Security Ltd. does not sell or install camera systems; our officers can watch and respond to an existing system as part of their duties.
Key insight: The most useful thing a guard does on a construction site is often small: closing the gate a subtrade left open, reporting the container nobody locked, or noticing the fence panel that was lifted. Those details are how most losses start.
Protecting a construction site from theft works best as a routine, not a one-off purchase. The steps we recommend to contractors across the Lower Mainland are:
Plan security with the site layout. Decide where the fence, gates, laydown area and storage containers go with security in mind. Fewer, well-lit entry points are easier to control.
Keep valuable items out of sight. Deliver high-value materials as close to installation as possible, lock tools away every night and park machinery where it can be seen from the patrol route.
Set an end-of-day checklist. Last person out checks containers, gates, fuel and power. A guard can verify the checklist at shift start and report gaps.
Cover the empty hours. Put a guard or patrol on the nights, weekends and holidays when the site is unattended.
Change the pattern. Randomised patrol times are harder to plan around than a fixed schedule.
Record everything. Shift reports, incident reports and a list of serial numbers for tools and equipment make insurance claims and police reports far more useful.
Review as the build changes. The risks at excavation, framing and fit-out are different. Revisit the plan at each stage.
A dedicated on-site guard stays on the property for the whole shift. It suits large or high-value sites, projects storing expensive equipment on the ground, and sites that have already had incidents. The guard controls the gate, patrols on foot and responds on the spot.
Mobile patrol sends a guard in a marked vehicle to your site several times a night as part of a route, checking the perimeter, gates and containers and logging each visit. Our GPS-tracked mobile patrol records the time of every visit, so you can see exactly when your site was checked. It suits smaller projects, later-stage builds and contractors with several sites.
A hybrid combines the two: a static guard during the highest-risk phase or on the most valuable site, and patrols for the rest of the time or the rest of the portfolio.
On-site guard
Mobile patrol
Hybrid
Presence
Continuous for the whole shift
Scheduled or random visits
Continuous at peak risk, visits otherwise
Access control
Yes, staffs the gate
Checks the gate is locked
Staffed gate when it matters most
Best for
Large, high-value or previously targeted sites
Small or later-stage sites, multi-site contractors
Phased projects and mixed portfolios
Relative cost
Highest (billed per guard-hour)
Lowest (billed per visit or route)
In between, adjustable by phase
Reporting
Full shift report
Timestamped log of each visit
Both
We'll recommend the smallest amount of coverage that deals with your actual risk, and tell you when a full-time guard isn't necessary.
Construction security is quoted on a few simple drivers, and knowing them helps you budget and compare quotes fairly:
Service model. An on-site guard is billed per hour, per guard. Mobile patrol is usually billed per visit or per route, which spreads an officer's time across several properties.
Hours. The nights, weekends and statutory holidays a site needs most can carry higher rates.
Duration. A multi-month contract is priced differently from a one-weekend call-out.
Site risk and size. The value on site, the number of access points and any incident history affect how much coverage is sensible.
Extra duties. Gate logs, camera monitoring or fire watch during hot work add scope.
A professional quote also carries costs you can't see: licensing, training, WorkSafeBC coverage, liability insurance, supervision and 24/7 support. A price that looks far below the rest has usually dropped one of those. For more on how guard pricing works, see our guide to security guard costs in BC.
Construction site security is also about keeping people out of a hazardous place. Excavations, open floors, stacked materials and machinery can seriously injure someone who wanders in after hours. Keeping unauthorised people out, and documenting that you tried, is part of managing that exposure.
Guards are not police, and On Guard Security Ltd. provides unarmed guards. On a construction site their role is to deter, observe, ask people to leave on the owner's behalf, and call the police when a situation needs it. That calm, documented approach protects your crew and your reputation with the neighbours.
Some phases need a fire watch: a trained person patrolling on a set schedule when hot work is under way or a fire protection system is out of service, as directed by the local fire authority or your fire safety plan. Our fire watch service can run alongside your regular site coverage.
Key insight: The same guard can often cover access, patrol and fire watch duties on one shift, which is simpler to manage than booking separate providers for each job.
Before you sign a construction security contract in BC, confirm five things:
Licensing. Under the Security Services Act, the company needs a security business licence and every guard needs a security worker licence. Ask for the numbers and check them in the province's licence status verification tool.
Training. Guards should have completed Basic Security Training, plus a site orientation before their first shift.
WorkSafeBC and insurance. Ask for a clearance letter and a certificate of insurance, not just a verbal yes.
Reporting. Ask for a sample shift report and incident report. If a provider can't show you one, that's a warning sign.
Backup and supervision. Ask who you call at 2 a.m. and what happens when a guard calls in sick.
On Guard Security Ltd. is locally owned and based in Surrey, and has worked in BC security for more than 10 years. We provide construction site security across Surrey, Cloverdale, South Surrey, White Rock, Langley, Abbotsford and the wider Fraser Valley and Lower Mainland. Every guard is licensed and JIBC-trained, and every new hire completes a week of one-on-one training with a senior officer before working a site alone. We are WorkSafeBC compliant, fully insured and staffed 24/7, for short-term call-outs and long-term contracts.
Most sites need access control during working hours, a security presence after hours, someone who can detect and respond to problems, and written records of patrols and incidents. Fencing, lighting and locked storage do much of the work; a guard or mobile patrol covers the hours when the site is empty.
Is there security at construction sites?
Many sites have it, but there is no single rule requiring a guard on every project. It is usually the owner's or contractor's decision, often shaped by the value on site, the project's location, contract or insurance terms, and any incidents so far. A fire watch may be required separately when fire protection is out of service or hot work is under way.
How do you secure a construction site?
Plan the fence, gates and storage around security, keep entry points few and well lit, lock tools and materials away every night, use an end-of-day checklist, and cover nights and weekends with an on-site guard or randomised mobile patrol. Review the plan at each stage of the build.
How to protect a construction site from theft?
Reduce what's worth taking by delivering high-value materials close to installation and locking tools in containers. Make the site hard to enter with solid fencing and lighting. Remove the predictability with a guard or random patrols after hours, and keep serial-number lists and shift reports so any loss can be reported quickly.
Do construction sites have security guards?
Larger and higher-value sites often have a guard on site overnight and on weekends, sometimes with a gate post during the day. Smaller or later-stage sites more often use mobile patrol, and many contractors combine the two as the project changes.
Can construction site guards also provide fire watch?
Yes. A trained guard can carry out fire watch patrols during hot work or while a fire protection system is out of service, following the patrol interval set by the fire authority or your fire safety plan and keeping a timed log.
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