How to prevent construction equipment theft.
Tools, generators, and machines walk off job sites after hours. What gets taken and where, how to make equipment hard to take and easy to trace, and how to get eyes on the yard at night.
How do I prevent tool and equipment theft on a construction site?
Lock small tools in gang boxes or a container every night, park machines inside the fence with keys pulled and buckets down, and record and mark every serial number. Then have the yard watched after hours: only 14.5% of the value of property reported stolen in Washington in 2024 was recovered, so stopping a theft beats tracing it.
Eyes on the yard after the crew leaves
911 Sentinel camera monitoring watches the gate, the equipment park, and the tool containers from $900 a month, with the leased camera, installation, maintenance, and 90 days of video included, and added cameras from $250 a month. An alert reaches our team within 30 seconds, and within 3 minutes an operator warns the person off through the camera with a recorded voice, siren, and spotlights, then calls your team and the police.
On-site vehicle patrol, from $2,200 a month, parks our four-camera roof-rig vehicle on the site with periodic loops of the fence line, and drone surveillance, from $6,000 a month, sweeps sites too big to wire. One unarmed guard 8 hours a night in Seattle costs about $9,380 a month at the state contract median.
How often is equipment stolen in Washington?
Tools made up 4.8% of the property items reported stolen in Washington in 2024, seventh on the state's list of most-stolen property, according to the Washington Association of Sheriffs and Police Chiefs. Of the $1.16 billion in property reported stolen statewide that year, $168.7 million, or 14.5%, was recovered.
Those statewide figures don't count tractors and industrial equipment as motor vehicles, because their main purpose isn't carrying people.
What gets stolen, and from where?
| What gets stolen | Where on the site | What covers it |
|---|---|---|
| Hand and power tools | Gang boxes, trailers, truck beds, unfinished floors | Lock up nightly in a container under a light and a camera |
| Generators, compressors, welders | By the trailer, at the power run, near the gate | Chain to a fixed anchor inside the fence; a camera on the spot |
| Light towers and pumps | The perimeter and dewatering points | Camera coverage on the fence line; vehicle patrol for long perimeters |
| Skid steers, mini excavators, trailers | The edge of the site, or outside the fence | Park inside, boxed in by larger machines, keys pulled; a camera on the gate |
| Fuel | Fuel tanks and machine tanks | Locking caps; a light and a camera on the fuel area |
Make it hard to take
- Park machines inside the fence in a tight group at the end of each shift, small ones boxed in by large ones, buckets and blades down.
- Pull keys every night and keep them off site; add a battery disconnect or immobilizer and lock it.
- Lock tools in gang boxes or a container with a shrouded lock, and chain boxes down or set them where a truck can't back up to them.
- Don't leave tools in truck beds or on unfinished floors overnight.
- Light the gate, the equipment park, and the container doors.
- Count tools out and back in each day, so a loss is noticed the next morning, not the next week.
Make it easy to trace
- Keep a list of every machine, attachment, and power tool with its make, model, serial number, and a photo.
- Mark tools and attachments with your company name, and engrave or etch where a serial plate could be pried off.
- In Washington, knowingly obscuring a serial number or other identification mark on a machine, engine, or device to make it unidentifiable is a gross misdemeanor, and so is possessing one held for sale knowing its number was obscured (RCW 9A.56.180).
- Theft is graded by value: over $750 is theft in the second degree, a class C felony, and over $5,000 is theft in the first degree, a class B felony (RCW 9A.56.040, RCW 9A.56.030).
- Report a theft the day you find it, with the serial numbers, photos, and the night's video.
Common questions
What is the best way to prevent equipment theft on a construction site?
Lock tools away every night, park machines inside the fence with keys pulled, record and mark every serial number, light the yard, and have it watched after hours, so a person is warned off and the police are called while they're still there.
How much stolen property is recovered in Washington?
About 14.5% by value in 2024: of $1.16 billion in property reported stolen statewide, $168.7 million was recovered, according to the Washington Association of Sheriffs and Police Chiefs.
Is it a crime to remove a serial number from equipment in Washington?
Obscuring the identity of a machine is a gross misdemeanor in Washington. It covers knowingly removing, defacing, or altering a serial number or identification mark to make a machine, engine, or device unidentifiable, and possessing one held for sale knowing its number was obscured.
Can someone watch an equipment yard at night without a guard?
Yes. Monitored cameras watch the gate, the machine line and the laydown area during your monitoring window, and an operator warns anyone who shouldn't be there within 3 minutes of the alert, then calls your team and the police. 911 Sentinel camera monitoring starts at $900/mo.
Sources
Checked .
- Washington Association of Sheriffs and Police Chiefs, Crime in Washington 2024 annual report
- RCW 9A.56.180, obscuring the identity of a machine
- RCW 9A.56.040, theft in the second degree
- RCW 9A.56.030, theft in the first degree
- Washington DES statewide contract 00624, Security Guard Services (contract summary)
- Contract 00624 price sheet, effective August 1, 2026, updated September 25, 2026
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