Best construction security companies in San Antonio (2026)
San Antonio's construction runs on a mix you won't find together anywhere else — the South Texas Medical Center keeps expanding hospital and research buildings, the USAA campus and the broader corporate base near I-10 keep adding shells, and the military installations ring the city with government-adjacent work. Add the tourism-area projects near the River Walk and the residential explosion through Stone Oak and New Braunfels, and you get a metro where exposed copper and equipment vanish fast in the Texas heat. The construction security firms worth shortlisting here understand a medical-campus build and a sprawling suburban site, not just how to watch a downtown gate.
Calvis is not a security agency and holds no security license of its own. It vets construction-focused agencies across Greater San Antonio, confirms each holds a license from the Texas DPS Private Security Bureau and proper insurance, and matches your project to a crew that has actually held a Medical Center hospital build or a Stone Oak residential site through a long, hot South Texas summer. You get a short, verified list instead of a search-results page — which is what you want when a north-side pad sits full of material over a long Texas weekend.
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Inside construction site security in San Antonio
San Antonio construction lives in a few distinct zones: the continuous hospital and research expansion across the South Texas Medical Center, the corporate-campus work around the USAA campus and the I-10 corridor, the government-adjacent projects tied to the city's five major military installations, and the tourism-area builds near the River Walk and downtown. Residential sprawl pushes hard through Stone Oak, Helotes, and out toward New Braunfels. Because I-10, I-35, and I-37 all converge here and I-35 runs straight to the border, stripped copper and tools move out of the region fast, and the long, brutal South Texas summers that drive crews off the slab by early afternoon leave a Medical Center wing or a Stone Oak pad exposed far longer than the workday — which is when most jobsite losses actually happen.
Matched to
what you need.
Security needs aren't one-size-fits-all. The San Antonio network spans these construction site security specialties — tell us what you need and we match you to the agencies built for it.
Overnight & Weekend Jobsite Coverage
Officers hold the site from lockup to morning, with coverage planned around the long Texas holiday weekends and the South Texas heat schedule that empties a Stone Oak or Helotes slab by early afternoon, plus the AT&T Center and Alamodome event nights that crowd the downtown core. On a Medical Center hospital wing, the plan treats those empty overnight stretches as the highest-risk window, not the short workable workday.
- Ideal for
- Phased Medical Center builds and suburban residential sites that go dark overnight and over extended weekends.
- Coverage
- Medical Center, Stone Oak, Downtown, Helotes
Equipment & Material Theft Prevention
The focus lands on what moves fastest near the I-10/I-35 crossing — copper, medical-grade mechanical components, fuel, and small tools — with locked staging, lay-down audits, and a yard entry log. On a South Texas Medical Center rough-in, guards treat the specialized HVAC and copper as the high-resale draw it is, and with I-35 running straight to the border they secure the lay-down knowing material can move out of the region fast.
- Ideal for
- Medical and lab builds with valuable mechanical rough-ins, plus any site storing fuel and high-resale tools.
- Coverage
- Medical Center, Downtown, Southtown, Stone Oak
Access Control for Trades & Deliveries
On an active South Texas Medical Center campus shared with working hospitals, or a tight River Walk-adjacent tourism site, controlled gate access with verified sub and delivery logs is the difference between a secured site and an open one. Officers check credentials, stage deliveries so they don't tangle with patient traffic or the downtown tourism flow, and hand the construction manager a clean record of every trade and drop.
- Ideal for
- Medical-campus and downtown tourism sites where construction shares access with live operations and heavy sub traffic.
- Coverage
- Medical Center, Downtown, The Pearl, River Walk area
Mobile Patrol & Camera-Tower Monitoring
Solar camera towers and roving vehicle patrols cover the spread-out residential and commercial builds pushing through Stone Oak, Helotes, and out toward New Braunfels, where a single fixed post can't see acres of master-planned lay-down. Verified motion alerts get a live human response instead of an ignored alarm — the only thing that actually turns a crew around on a low-density north-side pad after the South Texas sun drops.
- Ideal for
- Large-footprint suburban residential and commercial sites where one guard can't watch the whole property line.
- Coverage
- Stone Oak, Helotes, New Braunfels, Alamo Heights outskirts
Hot-Work Fire Watch
Trained fire-watch officers cover welding, cutting, and torch-down roofing during and after the work, holding the monitoring window Texas code and insurers expect. On a Medical Center expansion tied into occupied hospital buildings or a stacked downtown infill, a smolder missed after a torch shift in the dry South Texas heat is a catastrophic risk, so the watch is documented and held to the full required duration.
- Ideal for
- Projects with welding, torch-down roofing, or grinding adjacent to occupied structures where fire watch is mandatory.
- Coverage
- Medical Center, Downtown, The Pearl, Southtown
A real bar,
not an ad auction.
Every agency in San Antonio clears the same four checks before it can take construction site security work. Licensing is verified through the Texas Department of Public Safety (DPS) Private Security Bureau.
State licensing verified
Every agency holds an active state security license. We confirm it before any agency can take work.
Active insurance on file
Current general-liability (and where applicable, workers' comp) coverage is verified, not assumed.
Background-checked officers
Agencies field licensed, background-checked guards — the people who actually show up on site.
Tracked reliability record
Shift-reliability is measured on the platform. Agencies that no-show or slip on coverage are removed.
What construction site security costs in San Antonio
Standard posts, patrol, and monitoring. Recurring contracts are typically priced below on-demand rates.
Coverage where an armed presence is warranted. Rates vary with risk profile and shift length.
Final pricing depends on site, hours, number of officers, and whether you need a static post or mobile patrol. Get a firm quote by requesting a match above.
Common
questions
Every agency is checked for a current license from the Texas DPS Private Security Bureau, valid general-liability and workers' comp coverage, and a real jobsite record before it reaches your shortlist. For San Antonio, Calvis specifically weighs whether a firm has actually held phased South Texas Medical Center builds as well as sprawling Stone Oak residential sites — very different assignments.
Unarmed jobsite officers in San Antonio generally run $27–42/hr and armed officers $50–80/hr, with the rate driven by shift length, overnight coverage, site footprint, and how exposed your material is. Calvis gathers competing quotes from vetted agencies so you compare real bids instead of one number.
The agencies are. Calvis is not a licensed security provider — it matches you with independent firms that hold their own license from the Texas Department of Public Safety (DPS) Private Security Bureau. That license belongs to the agency you hire, never to Calvis.
Yes, it's a San Antonio specialty given the Medical Center's constant expansion. Vetted agencies run controlled access that separates construction traffic from patient and emergency flow, verify every sub and delivery, and protect the medical-grade mechanical rough-ins that make these phased campus builds unusually high-value targets.
Hiring direct means personally verifying each firm's Texas DPS license, insurance, and whether it has actually run medical-campus and large suburban sites. Calvis has already screened agencies across Greater San Antonio and gives you a short, checked list with competing quotes, so you skip the cold-calling and the risk of an unproven crew on an exposed Medical Center build.
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San Antonio.
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