Active construction sites are open perimeters with valuable materials and a layout that changes weekly. What an assessment covers, and when guards beat cameras.
Los Angeles builds constantly. Towers going up downtown, podium projects in Hollywood, infill housing across the Valley. Every one of those sites spends months as an open perimeter filled with copper wire, power tools, and heavy equipment, worked by dozens of people who do not know each other. That combination makes construction one of the harder physical security problems in the city, and one of the least standardized.
A physical security assessment for an active site is not the same job as an assessment for a finished building. Here is what is actually different, and what a good one covers.
The perimeter is plywood and chain link, and it moves. Gates open where the concrete trucks need them, not where the security plan says. A camera layout drawn in January is wrong by March because the building that was blocking the sightline is now four stories tall.
Access is the harder issue. A busy site sees dozens of subcontractors, inspectors, and deliveries every day. Everyone wears a vest and a hard hat, so everyone looks legitimate. Tailgating is not a technique here. It is just walking in.
Then there is what sits inside the fence. Copper wire, spools of cable, appliances staged for install, generators, and tools all have immediate resale value. Theft from construction sites is a national problem, and Los Angeles, with the volume of active projects it runs at any given time, gets its share of it.
Liability runs in the other direction too. Trespassers get hurt on sites, and owners face claims from people who were never supposed to be there. Scaffolding, ladders, and cranes get climbed for the view and for content. The site that is not secured is the site that gets climbed.
Perimeter and phasing. Where the fence actually is this month, where the openings are, and how that shifts with the schedule. The assessment maps security to the project timeline, not to a fixed site diagram.
Lighting. Where the shadows sit at 2am, and which lights run on temporary power that someone can unplug. Lighting that goes dark when a generator moves is not lighting.
Cameras. Placement, power, and connectivity, with an honest caveat: cameras on poles get stolen too. A camera plan that assumes the camera survives is a plan that fails once.
Access control. Who is badged, how deliveries get logged, and whether anyone actually checks. The question is never what the policy says. It is what happens at the gate at 6:40am when the line is twenty deep.
Laydown yards. Where high-value material sits relative to the fence line and the street. Copper staged thirty feet from chain link on a quiet street is a decision, whether or not anyone made it on purpose.
Equipment. Marking, immobilization, and key control. An excavator with a universal key in the ignition is not stored. It is parked.
The neighbors. Scaffolding and material hoists are climbing aids into the occupied building next door. In dense parts of Los Angeles, your perimeter problem becomes the adjacent tenant's problem, and their insurer will say so.
Cameras record. That is what they do. Motion alerts on a construction site trip on tarps, dust, and stray dogs, and a monitored feed only works if someone is actually watching and has a response to send.
Guards deter and respond, but one guard on a large site covers one sightline. Post orders matter more than headcount: what the guard checks, on what circuit, with what escalation when something is wrong. A guard without post orders is a person sitting near a fence.
The honest answer is that the right mix changes with the phase of the project. Excavation and framing have different exposure than fit-out, when the appliances and fixtures arrive and the material value inside the fence peaks. An assessment that does not account for the schedule will be right once and wrong the rest of the project.
An active construction site is a California workplace, which means SB 553 applies to it. Every employer on the site owes its own crew a workplace violence prevention plan, training, and an incident log. Confrontations with trespassers and thieves are exactly the kind of incidents that end up in that log, and on a site with a general contractor and a dozen subs, each employer's obligation is its own. A plan that lives in the GC's trailer binder does not cover the electrical sub's crew.
The two moments that matter are before mobilization and at each major phase change. The first sets the perimeter, access, and camera plan before habits form. The second catches the site as it actually is, not as the drawings said it would be.
Physical security assessments across the industry generally run from $5,000 to $25,000 depending on the size and complexity of the site. For context on what drives that range, see our breakdown of what a physical security assessment costs. Either end of that range is cheaper than the second insurance claim.
Braav runs physical security assessments across Los Angeles, including active construction sites. If you want a site walked by someone who will tell you what is actually wrong with it, book a call here.