Knowing how long to hire security guards for your construction project saves you thousands of dollars in stolen materials, missed deadlines, and insurance claims. Construction theft costs the industry over $1 billion every year in the United States. Worse, only about 25% of stolen equipment ever comes back. Southern California sites face some of the highest theft rates in the country, so smart contractors plan security from day one.
When Should You Start Hiring Security Guards for a Construction Project?
The day you stage your first delivery on site is the day you should hire security guards. Lumber, copper wire, tools, and equipment all become targets the moment they arrive. In fact, the highest theft losses happen within the first 72 hours of a delivery sitting on an unsecured site.
Start security coverage when you do any of these things:
- Drop the first load of lumber or rebar
- Bring heavy equipment like excavators, skid steers, or generators
- Install temporary power or water
- Place office trailers or tool storage on site
- Pour the foundation
- Stack copper wire, pipe, or HVAC components
Many contractors wait until after a theft to bring guards on site. However, by then the theft already happened. Insurance can cover some of it, but the project delays and replacement orders cost far more than guards would have.
When Can You Stop Hiring Construction Site Guards?
You can stop hiring construction site guards once your project hits final lockup or final occupancy. Lockup means every door, window, and access point closes and locks securely. Final occupancy means the city issues the certificate of occupancy and the owner takes control.
Most contractors keep guards on site until at least one of these milestones hits:
- All exterior doors, windows, and garage doors lock
- Final inspections pass
- You have the certificate of occupancy in hand
- Crews install and power all appliances, fixtures, and copper
- The owner or property manager takes over building security
Some high-value commercial projects keep guards even after occupancy until the property’s own security system goes live. Therefore, plan your security timeline based on when the building can actually defend itself, not just on the construction calendar.
How Many Hours Per Day Should Construction Security Guards Work?
Most construction sites need guards during the hours no one else is working. Thieves hit job sites at night, on weekends, and during holidays when no crews are around. As a result, the coverage you really need depends on when your site sits empty.
Here are the most common coverage patterns:
- Nights only (6 PM to 6 AM): Good for low-risk residential and small commercial sites.
- Nights and weekends: The most common pattern. Covers every hour your crew is not on site.
- 24/7 coverage: Standard for high-value commercial, infrastructure, and downtown LA sites.
- Roving patrols: A guard drives between several sites on a schedule. Cheaper but leaves gaps.
- Event-based coverage: A guard on site only on delivery days or pour days.
For example, a Class A office build in downtown Los Angeles almost always uses 24/7 coverage. Meanwhile, a single-family home build in the San Fernando Valley may only need nights and weekends. Talk to your security company about your specific schedule to find the right fit.
High-Risk Phases That Need Extra Security Coverage
Some phases of construction draw thieves more than others. Knowing these high-risk windows helps you plan extra coverage at the right time. The most-targeted phases include:
- Foundation and framing: Lumber and rebar pile up in the open.
- Rough plumbing and electrical: Copper pipe and wire arrive in bulk.
- HVAC installation: Compressors and units sit accessible for days.
- Finish work: Appliances, faucets, and fixtures fill the site.
- After major deliveries: Anytime expensive materials drop without immediate install.
- Holidays and long weekends: Crews are gone, but materials stay.
Smart contractors add extra guards during these phases. For example, doubling up guards for the first 48 hours after a copper delivery often cuts theft to zero. Meanwhile, scaling back during low-risk phases keeps the security budget under control.
How Project Type Affects How Long You Need Construction Security Guards
Different construction projects need different security timelines. The size, value, and location of your site all change how long you need coverage. Here is a rough breakdown:
- Single-family homes: 4 to 8 weeks of coverage, mostly nights and weekends.
- Small multifamily (under 20 units): 4 to 9 months, with 24/7 coverage during framing and finish.
- Mid-size commercial: 6 to 12 months, often 24/7 for the full build.
- Large commercial and industrial: 12 to 24 months, with 24/7 coverage and multiple guard posts.
- Infrastructure projects: 1 to 5 years, with rotating teams and roving patrols.
- Tenant improvements: Days to weeks, sometimes just delivery-day coverage.
If your project crosses categories, hire a security company that builds a custom plan instead of selling you a flat package. For example, our construction site security guards work with builders across Southern California to match coverage hour by hour with what each phase actually needs.
How Much Does It Cost to Hire Construction Site Security Guards?
Construction site security guards in California usually cost between $25 and $45 per hour per guard. The exact rate depends on whether the guard is armed or unarmed, the location of the site, and the length of the contract. As a result, your total cost depends mostly on how many hours of coverage you actually need.
To estimate your total budget:
- Multiply your hourly rate by the number of hours per day
- Then multiply by the number of days you need coverage
- Add a buffer for high-risk phases that need extra guards
- Factor in supervisor visits, dispatch, and reporting
For example, nights-only coverage (12 hours a day) at $32 per hour costs about $384 per day, or roughly $11,500 per month. Meanwhile, 24/7 coverage runs closer to $23,000 per month for one guard post. Construction theft data from the National Insurance Crime Bureau shows that even one prevented theft usually pays for months of guard coverage.
How Guardian National Security Plans Your Construction Coverage
Guardian National Security has protected construction sites across Southern California since 1997. We walk every site before quoting, map theft risks by phase, and build a coverage plan that matches your project timeline hour by hour. Our BSIS-licensed guards know which deliveries draw thieves, when to call police, and how to write the reports your insurance carrier needs.
Our construction site security service includes:
- BSIS-licensed armed and unarmed guards
- Detex GPS-tracked patrols every shift
- Daily activity reports your project manager can audit
- 48-hour deployment on new contracts
- Coordination with general contractors, subs, and local police
- Price match guarantee on every quote
Get a Quote on Construction Security Today
Knowing how long to hire security guards for your construction project starts with a real site walkthrough, not a phone-call guess. Guardian National Security plans coverage around your delivery schedule, your phase risk, and your insurance requirements. We dispatch guards 24/7 across Los Angeles, the Inland Empire, the San Fernando Valley, and the rest of Southern California.
Ready to protect your job site from day one? Request a free quote today and get a full walkthrough within 48 hours.
