Jobsites & Development Projects
Security Company for Construction Sites in Western Washington
Diligence Security provides high-visibility construction site security, gate access control, Mobile Patrols, theft deterrence, and written shift reporting for active projects and properties awaiting tenant occupancy.
A Security Company for Construction Sites Across Puget Sound
Lumber, wire, appliances, copper, and tools disappear overnight, and an unsecured jobsite invites trespass, dumping, encampment activity, and vandalism that costs far more than the stolen material. Diligence Security protects active projects from Pierce County and King County to Kitsap and Thurston, including Seattle, Tacoma, and Bellevue high-rise and multifamily work.
High-Visibility Security for Active Construction Sites
Marked vehicles and uniformed Officers establish a conspicuous presence at gates, perimeters, laydown yards, equipment areas, and unfinished structures. Site Instructions identify the areas to check, access rules, Client contacts, and reporting expectations. Digital Patrol Logs document completed activity, observations, and actions taken. Certified Fire Watch is also available when a sprinkler or alarm system is impaired.
Jobsite Phases and the Coverage That Fits Each
- Sitework and excavation: randomized overnight Patrol laps to protect staged equipment, fuel, and trailers before the perimeter fence means anything.
- Framing and rough-in: the highest-theft phase — copper, wire, and appliances on site with open walls. A dedicated Officer through the high-risk hours pays for itself quickly.
- Finishes and inspection: gate access control for the subcontractor surge, plus Fire Watch coverage whenever life-safety systems are down or hot work is underway.
- Turnover and lease-up: transition from jobsite coverage to residential or commercial Patrols as the first tenants move in, without changing providers.
Projects We Cover
- Multifamily and mixed-use builds, from framing through turnover
- Commercial ground-up, tenant improvement, and renovation projects
- Warehouse, distribution, and industrial development pads
- Public works, road, and utility projects with staged equipment
- Single-family developments with multiple houses under construction at once
Site Protection
- Overnight and weekend Patrols of perimeters, gates, and material laydown areas
- Equipment and container checks with photo documentation each shift
- Access control and contractor verification during active build hours
- Deterrence of trespassing, dumping, and copper theft on unfinished structures
- Written shift reports your Superintendent receives, not verbal summaries
OSHA-Aware Officers for Construction Environments
Construction assignments require awareness of active equipment, changing access routes, fall hazards, restricted areas, and required personal protective equipment. Our Officers receive OSHA-focused safety training and follow the General Contractor's site rules and Site Instructions. Coverage may include a Gate or On-site Officer during build hours plus Mobile Patrol laps after the crews leave, with alarms and after-hours callouts handled by our 24/7 Emergency Services line.
Need Fire Watch Instead?
Fire Watch is its own service with its own code requirements. If a sprinkler or alarm system is impaired, or hot work requires a continuous watch, go straight to Emergency Fire Watch — certified Officers, NFPA and IFC patrol intervals, and the continuous logs an inspector will ask to see.
Request Jobsite Coverage
Tell us the project, phase, hours, and access-control needs so we can prepare the appropriate coverage plan. Contact Diligence Security to start construction coverage, or review the cities and counties we serve.
Construction & Development Security Questions, Answered
- What does a construction site Security Officer do?
- A construction site Security Officer controls the gate during active build hours, verifies contractors and deliveries, patrols the perimeter and material laydown areas overnight and on weekends, photographs equipment and containers each shift, deters trespass and illegal dumping, and submits a written report the General Contractor can act on.
- Do you provide overnight jobsite Patrols instead of a full-time Officer?
- Yes. Many projects start with randomized overnight and weekend Mobile Patrol laps, which is the lowest-cost way to cover a site. Once material value on site increases or theft becomes repetitive, Clients usually move to a dedicated On-site Officer for the high-risk hours.
- How much does construction site security cost?
- Cost depends on the number of hours, whether coverage uses a fixed post or Mobile Patrols, and how many gates or structures need attention. We review the requirements and provide a written quote based on the requested coverage.
- Can you control gate access and log deliveries?
- Yes. Gate Officers verify subcontractors against your approved list, log delivery trucks in and out, keep unauthorized vehicles off the pad, and record who was on site and when — a record that matters when tools or materials go missing.
- Do you cover multifamily and commercial projects during construction and after turnover?
- Yes. Coverage frequently continues past turnover, transitioning from jobsite Patrols to residential or commercial coverage as the first tenants move in. Diligence Security staffs projects across King, Pierce, Snohomish, Kitsap, and Thurston Counties.
- What about Fire Watch during construction?
- Fire Watch is a separate, code-driven service with its own requirements. When a sprinkler or alarm system is impaired or hot work is underway, our certified Emergency Fire Watch Officers stand the continuous, documented watch the Fire Marshal requires — usually deployed within the hour.
Protect your people with a Team you can trust and verify.
Request a professional site evaluation or immediate emergency deployment. Local Supervisors respond fast across the Puget Sound.