Your cameras are recording all night. Nobody is watching.

1. The overnight coverage gap: what actually happens after 6pm

Most Class B and C apartment communities have between 8 and 30 security cameras spread across parking lots, building entrances, hallways, mailrooms, pools, and perimeter areas. Those cameras feed into a DVR or NVR sitting in a closet near the leasing office. During business hours, someone on staff might glance at the monitors. After hours, nobody does.

The math on this gap is sobering. According to the Bureau of Justice Statistics, the majority of property crimes at apartment communities occur between 6pm and 6am. That means the window when your cameras are unmonitored is precisely the window when incidents are most likely to happen. Your system is recording evidence of crimes, not preventing them.

For property managers at Class B and C communities, this creates a painful cycle. An incident happens overnight. A tenant discovers it in the morning. They report it to the leasing office. Staff pulls up the DVR footage, scrubs through hours of recordings, finds the relevant clip, and files a police report. By then the damage is done, the perpetrator is long gone, and the tenant is already looking at apartments on Zillow.

Tenant turnover driven by safety concerns costs $3,000 to $5,000 per unit in vacancy loss, make-ready, and leasing commissions. On a 200-unit Class C property, losing even five tenants per year to security concerns means $15,000 to $25,000 in direct costs, plus the reputational damage that makes future leasing harder.

2. Why guards don't work for Class B/C properties

The instinctive reaction to the overnight gap is to hire a security guard. The problem is that the economics simply do not work for workforce housing.

A single overnight security guard costs approximately $3,000 per month. That is one person, in one spot, for one shift. On a 10-acre Class C property with 15 buildings, that guard can physically be in one location at a time. They patrol on foot or in a vehicle, covering maybe 20% of the property at any given moment. The other 80% is unmonitored while the guard walks through building 7.

The budget constraints at Class B and C properties make this worse. Operating margins on workforce housing are already thin. A $3,000/month guard line item on a 150-unit property with $1,100 average rents consumes roughly 2% of gross revenue. That is a significant operating expense for coverage that is physically limited to wherever one person happens to be standing.

There are also reliability problems. Guard companies serving the Class B/C segment experience high turnover. It is common for a guard to no-show, arrive late, or spend shifts sitting in a parked car. Property managers rarely have visibility into whether the guard actually patrolled the property or sat in the parking lot for eight hours. You are paying for a presence, not necessarily for coverage.

None of this means guards are useless. For Class A properties with higher rents and bigger security budgets, a uniformed guard at the entrance creates a visible deterrent and a concierge-like experience. But for Class B and C communities where the priority is catching real incidents across a large footprint on a limited budget, one guard in one spot is not the answer.

3. AI monitoring layers that plug into existing DVRs

The newer approach to overnight security is adding an AI monitoring layer on top of your existing camera infrastructure. Instead of replacing your cameras or your DVR, these solutions tap into the video feeds you already have and apply computer vision to detect events in real time.

There are several categories of solutions worth understanding:

Remote video monitoring services (human operators). Companies like Stealth Monitoring, Pro-Vigil, and Interface Security Systems offer live operators who watch your camera feeds from a central monitoring station. When they see something, they can trigger a loudspeaker warning or call local police. These services typically cost $500 to $1,500 per camera per month, which adds up fast on a property with 15 or more cameras. They also require specific camera models and internet bandwidth. The response quality depends entirely on the attentiveness of the operator watching your feed alongside dozens of other properties.

Cloud-based AI analytics. Companies like Rhombus, Verkada, and Arcules offer cloud-connected cameras with built-in analytics. These are excellent products, but they typically require replacing your existing cameras with their proprietary hardware. On a property with 20 cameras already installed, ripping out working equipment and buying new cameras at $500 to $1,200 each is a $10,000 to $24,000 capital expense before you even start paying monthly fees. For Class B/C properties with tight CapEx budgets, that is often a non-starter.

Edge AI devices that connect to existing systems. This is the newest category. Devices like Cyrano connect directly to your existing DVR or NVR via HDMI, analyze the camera feeds locally (on the device, not in the cloud), and send real-time alerts when they detect people, vehicles, or specific events. Because they work with whatever cameras and DVR you already have, there is no camera replacement, no new wiring, and minimal setup time. Cyrano, for example, monitors up to 25 cameras per unit at $200/month after a $450 one-time hardware cost.

The key distinction for property managers: some solutions require you to replace your existing infrastructure, while others layer on top of it. For Class B/C properties where the cameras and DVR are already installed and working, add-on solutions that leverage your existing investment tend to deliver the best ROI.

4. Comparison: guards vs. remote monitoring vs. AI edge devices

Here is a side-by-side comparison of the major approaches to closing the overnight security gap. All costs are approximate and based on a typical 150-unit Class B/C property with 20 existing cameras.

The cost difference is dramatic. An overnight guard at $3,000/month covers one location at a time. Remote human monitoring for 20 cameras could easily exceed $10,000/month. Cloud AI cameras require $10,000 to $24,000 upfront to replace your existing hardware. An edge AI device like Cyrano covers all 20 cameras for $200/month with a $450 one-time hardware purchase.

On a per-camera basis: the guard cannot realistically monitor more than one or two areas simultaneously. Remote monitoring at $500/camera means $10,000/month for 20 cameras. Cyrano works out to $10/camera/month for all 20.

Real deployment numbers. At a Class C multifamily property in Fort Worth, TX, Cyrano was installed on an existing DVR system with 16 cameras. In the first 30 days, the system flagged 20 incidents including a break-in attempt, multiple trespassers, and unauthorized vehicles in the parking area overnight. The property manager renewed after the first month. Prior to installation, these incidents were only discovered when staff reviewed footage the following morning, if they reviewed it at all.

5. What to look for in an AI security add-on

If you are evaluating AI monitoring solutions for your property, here are the questions that matter most for Class B/C operators:

• Does it work with your existing cameras and DVR? Any solution that requires ripping out your current system adds $10,000+ in CapEx. Look for products that connect via HDMI, RTSP, or ONVIF to whatever hardware you already have. If your cameras work today, they should work tomorrow with the AI layer added.
• How many cameras can it handle per unit? Some AI solutions price per camera, which gets expensive quickly on properties with 15 to 25 cameras. Look for flat-rate pricing that covers all your cameras. Cyrano, for example, covers up to 25 cameras per device at one flat monthly rate.
• Where does the processing happen? Cloud-based solutions send your video feeds to remote servers for analysis. This requires significant bandwidth and raises privacy questions. Edge-based solutions (devices that process video locally on the property) keep footage on-site and work even if your internet connection drops. For properties with limited bandwidth or privacy-conscious ownership groups, edge processing is a meaningful advantage.
• What is the alert latency? The whole point of closing the overnight gap is catching incidents as they happen, not reviewing them later. Ask vendors how quickly an alert reaches your phone after someone enters the parking lot at 2am. The best systems deliver notifications within seconds.
• Can you search footage in plain English? When the leasing office opens at 8am and a tenant reports something from last night, can your team search for “person near building 4 between midnight and 3am” instead of scrubbing through hours of video? Natural language search turns hours of footage review into a 30-second query.
• What is the total cost of ownership? Ask about hardware costs, monthly fees, installation charges, required internet upgrades, and contract length. A solution that costs $200/month with a $450 device and a 2-minute install has a very different TCO than one that costs $100/month per camera but requires $15,000 in new hardware and a full-day installation.

The overnight security gap at Class B and C apartments is not a technology problem. The cameras are already there. The DVR is already recording. The problem is that nobody is watching between 6pm and 7am. The best solutions plug into what you already have and start watching immediately, turning your passive recording system into an active monitoring system without replacing a single camera.