AI vs Traditional CCTV for Construction Sites: A Cost Comparison

The traditional model: what you're actually paying

A mid-sized construction site — 3 acres, £12M contract value, 18-month build — typically employs 2 overnight security guards at roughly £15–£18 per hour per guard. Factor in agency fees, holiday cover, and weekend premiums, and the real annual security payroll lands between £90,000 and £130,000. Add passive CCTV infrastructure (cameras, NVR, maintenance) and you're looking at £100,000–£150,000 per year for a system that responds to incidents after the fact.

That passive CCTV only alerts you when something has already happened. Equipment theft, PPE violations, and trespassing are discovered at the start of the next shift — often hours after the event. The footage is reviewed retrospectively, rarely leading to prosecution, and the cost of stolen plant equipment (averaging £6,200 per incident according to NICB data) is absorbed by the project's contingency budget.

AI surveillance: the full cost breakdown

An AI-monitored deployment for the same site — 20 cameras, perimeter coverage, tower-mounted mobile units at access points — runs at approximately £2,500–£4,500 per month depending on camera count and tier. That's £30,000–£54,000 per year. Even at the higher end, that's a 60% reduction against the traditional model before any incident cost savings are factored in.

The system monitors every camera simultaneously, 24/7. Perimeter breach, plant movement outside working hours, or PPE non-compliance triggers an alert within seconds — verified by a human operator before any action is taken. The difference isn't just cost: it's the quality of response. An AI-human system can alert a supervisor, trigger a verbal warning via site speaker, or escalate to emergency services — all within the time it takes a guard to walk from one end of the site to the other.

Side-by-side comparison

The ROI case for a 30-day pilot

The most common objection to switching is disruption — "we're mid-project, we can't change systems now." The reality is that AI surveillance doesn't require any existing infrastructure to be removed. It runs alongside your current setup. Most construction clients are ROI-positive within 45–60 days simply from the reduction in guard hours, before any incident cost savings are included.

One Tier 1 contractor in Hong Kong reduced their security payroll by 60% across 3 active sites in the first quarter of deployment. The remaining guard resource was redeployed to active access control and visitor management — adding genuine value rather than passive patrols.