Can overnight building patrol be automated?

An empty office tower at night is a lot of square footage of nothing happening, checked by one person with a flashlight. The economics of that arrangement are what put patrol robots on the map.

Free, about two minutes, no phone number. You get an honest no when a robot is the wrong answer.

What the job actually is

After close, someone walks floors on rounds: doors that should be locked, water where it should not be, people where they should not be. It takes four or five hires to keep one 24/7 chair filled, which is how a single post reaches 150 to 250 thousand dollars a year.

Signs it is worth automating

• The building is genuinely empty overnight and the post exists for rounds and deterrence.
• Your guard log shows the same uneventful round, every hour, for years.
• Water leaks, open doors and propped exits are what actually gets found on rounds.
• Six or more floors make human rounds slow and thin.
• You already have cameras but nobody watches them live.

What the cell looks like

An indoor patrol platform running scheduled routes with cameras and sensors reporting to a remote monitor, or a legged platform where stairs and thresholds rule wheels out. Multi-floor coverage is the design question: elevator integration for wheeled units, stairs for legged ones. The usual honest outcome trims overnight and weekend posts while daytime keeps a person, because lobbies need greeting and judgment.

When the answer is no

• The overnight person also runs the loading dock, handles after-hours vendors or does maintenance checks that need hands.
• Your floors are cluttered construction zones where any robot faults nightly.
• The building never actually empties; people around all night shift the case toward cameras plus analytics instead.
• You want it to also be the receptionist. The greeter robot category failed commercially; delivery and patrol survived.

What an engineer has to verify

• Elevator integration: which controller generation your building runs and who is certified to interface with it.
• What the monitoring arrangement costs and who employs the human who responds.
• The failure protocol: what happens the night the robot is docked with a fault.
• Whether your insurer gives any credit for documented continuous patrol; some do.

Safety is not on that list because it is not ours to determine. Cell design, guarding and the risk assessment belong to an independent certified integrator, every time.

What the research says

Peer reviewed work from our research library on this application. These are studies of other plants and other settings, not a prediction about yours, and the excerpts are the authors' own words. Every title links to the source so you can check us.

• Toward Intelligent Security Robots: A Survey Theodoros Theodoridis and Huosheng Hu (2012), IEEE Transactions on Systems Man and Cybernetics Part C (Applications and Reviews)

  From the abstract: “In this paper, a survey is being conducted on the investigation of a four-class taxonomy related to security robots that appeared over the past three decades.”

• "Would I Feel More Secure With a Robot?": Understanding Perceptions of Security Robots in Public Spaces Gabriela Mariana Marcu et al. (2023), Proceedings of the ACM on Human-Computer Interaction

  From the abstract: “Robots are increasingly being deployed as security agents helping law enforcement in spaces such as streets, parks, or shopping malls.”

• Field Trial of a Queue-Managing Security Guard Robot Sachi Edirisinghe et al. (2024), ACM Transactions on Human-Robot Interaction

  From the abstract: “We developed a security guard robot that is specifically designed to manage queues of people and conducted a field trial at an actual public event to assess its effectiveness.”

• Rewarding Trust: How Reward Power Shapes Security Robot Acceptance Xin Ye and Lionel Robert (2025), Proceedings of the Human Factors and Ergonomics Society Annual Meeting

  From the abstract: “As security robots take on more societal roles, public resistance can hinder their effectiveness.”

• Narrowing urban public space by patrol: how a security robot reorders underground mobilities John Guy Perrem (2026), Mobilities

  From the abstract: “Robots are increasingly visible in Japan’s service economy as organisations respond to labour shortages.”

The full security patrol robots and drones shelf has 11 works.