How to upgrade your multifamily security cameras without replacing them

1. The real problem with multifamily camera systems

Walk into any apartment community built in the last 15 years and you'll find cameras. Parking garages, pool areas, hallways, leasing offices, mail rooms — they're everywhere. The average 200-unit property has 16 to 32 cameras connected to a DVR or NVR sitting in a closet somewhere near the leasing office.

These systems cost $8,000 to $40,000 to install originally. They record 24/7. And in the vast majority of cases, nobody watches a single feed until something bad has already happened. Industry estimates suggest that over 90% of commercial camera systems operate in pure record-and-forget mode.

The result is predictable. A tenant's catalytic converter gets stolen at 2 AM. A package disappears from the mail room. Someone tailgates through the parking gate. The property manager finds out the next morning, pulls up the DVR, and spends 30 to 60 minutes scrubbing through footage trying to find the incident. Maybe they find it. Maybe they don't. Either way, the damage is done.

The cameras did their job — they recorded. But recording isn't security. Security requires detection and response, and that requires someone (or something) actually watching. The question isn't whether you need new cameras. It's whether you need something watching the cameras you already have.

2. Option 1: Full camera replacement

The most commonly pitched solution. Companies like Verkada, Rhombus, and Avigilon sell modern cloud-managed IP camera platforms with built-in analytics. These are genuinely good products — high-resolution sensors, cloud storage, mobile apps, and some level of AI-powered alerting built into each camera.

But the implementation path is where it gets expensive and disruptive:

• Camera hardware:$300 to $1,200 per camera. For a 20-camera property, that's $6,000 to $24,000 in cameras alone.
• New cabling: Most modern IP cameras require Cat6 for PoE (Power over Ethernet). If your property runs coax for analog cameras, every single run needs to be replaced. Cable installation costs $150 to $400 per run, adding $3,000 to $8,000 for a 20-camera property.
• NVR/server replacement:Your existing DVR isn't compatible. Add $2,000 to $5,000 for a new NVR or cloud gateway device.
• Monthly cloud subscription: $200 to $600 per month per property for storage, analytics, and portal access.
• Construction disruption: Running new cable means ceiling tiles coming down, conduit being installed, and contractors on-site for one to three weeks. Tenants notice. Residents complain. Common areas are partially blocked.

Total Year 1 cost for a 20-camera property: $13,400 to $44,200 including hardware, installation, and the first year of subscriptions.

For a Class A property in the middle of a major renovation, this can make sense — you're already behind walls. But for a stabilized Class B or C asset where the existing cameras produce usable footage, ripping out functional hardware to install new hardware is a hard sell to ownership. The problem was never the cameras. It was the monitoring.

3. Option 2: Cloud-based AI overlay software

A newer category that tries to split the difference. Cloud AI overlays connect to your existing camera feeds (usually via RTSP streams from your NVR) and send the video to remote servers for AI analysis. The idea is sound: keep your existing cameras, add intelligence through software.

In practice, there are several friction points:

• Bandwidth requirements:Streaming 16 to 32 camera feeds to the cloud requires significant upload bandwidth — typically 50 to 150 Mbps of dedicated upstream. Many older multifamily properties don't have this available on their property network, and upgrading the internet connection adds $100 to $300/month.
• NVR compatibility: Not every DVR/NVR exposes RTSP streams in a way that cloud software can access. Older analog DVRs are often incompatible entirely, requiring either a DVR replacement or an encoder device ($500 to $2,000).
• Latency: Uploading video, processing it in the cloud, and delivering an alert takes 15 to 60 seconds depending on the service. For time-sensitive events like break-ins or gate tailgating, that delay matters.
• Privacy concerns: Video of your tenants leaving the property in cloud data centers can create liability exposure, especially in states with strict data privacy laws.
• Monthly cost: $150 to $500/month per property, plus potential bandwidth upgrade costs.

Cloud overlays work well for properties with modern NVRs, strong internet infrastructure, and IT staff who can manage the integration. For the average Class B/C multifamily property with an aging DVR and a basic Comcast business line, they can be more trouble than they're worth.

4. Option 3: Edge AI devices that plug into your DVR/NVR

The third approach is the newest and arguably the simplest. An edge AI device is a small box that connects directly to your existing DVR or NVR — typically via the HDMI output that's already on the back of every recording device. It watches every camera feed in real-time, runs AI vision models on the device itself, and sends alerts when it detects security events.

The key differences from the other approaches:

• No camera replacement:Your existing cameras stay exactly where they are. Analog, IP, coax, PoE — it doesn't matter because the device reads the DVR output, not the individual camera feeds.
• No new cabling:One HDMI cable from your DVR to the device. That's it. No Cat6 runs, no conduit, no ceiling tiles.
• No cloud video upload: All processing happens on the device at the property. No video leaves the premises, eliminating bandwidth costs and privacy concerns.
• No DVR configuration:The device reads the HDMI output, which means you don't need to access the DVR's software, configure RTSP streams, or deal with firmware compatibility.
• Sub-two-minute installation: Plug in the HDMI cable, plug in power, and the device starts analyzing feeds. There is no simpler installation path.

One example in this category is Cyrano, which builds an edge AI device purpose-built for multifamily security. It costs $450 upfront for the hardware plus $200/month for the monitoring service. A single device supports up to 25 camera feeds and installs by plugging an HDMI cable into your existing DVR. The AI detects trespassing, loitering, tailgating, suspicious vehicle activity, and package theft, then sends real-time alerts via text and phone call to your designated contacts.

Edge devices aren't the right fit for every property — if your cameras are physically broken or producing unusable footage, you still need new cameras. But for the majority of properties where the hardware works and the gap is monitoring, this approach solves the actual problem at a fraction of the cost.

5. Side-by-side comparison: cost, install time, and disruption

For a typical 100-unit multifamily property with 20 existing cameras and a functioning DVR/NVR:

The numbers tell a clear story. Full replacement costs 5 to 15 times more than either alternative in Year 1, and the gap widens over time because the hardware investment doesn't depreciate on the subscription line. Cloud overlays can be cost-competitive but introduce bandwidth dependencies and compatibility requirements that add hidden costs. Edge devices have the most predictable cost structure: one upfront purchase, one monthly fee, no surprises.

6. What real-time monitoring actually catches

The theoretical case for AI monitoring is straightforward, but property managers want to know what it actually catches in practice. Here's what current AI systems reliably detect on standard analog and IP camera feeds:

• Trespassing:People entering pool areas after hours, accessing maintenance rooms, or entering restricted parking levels. The AI learns your property's schedule and flags activity outside of normal hours.
• Loitering: Individuals lingering in parking structures, stairwells, or near vehicle areas for extended periods. This is one of the strongest predictors of property crime.
• Gate tailgating: Unauthorized individuals or vehicles following residents through secured entries. This is the single most common security vulnerability at gated communities.
• Package theft: Suspicious activity near mail rooms and package lockers — someone approaching, grabbing items, and leaving quickly.
• Vehicle-related incidents: Unusual activity around parked vehicles (break-ins, catalytic converter theft), vehicles in restricted areas, and vehicles circling the property repeatedly.
• Vandalism and dumping: Damage to common areas, illegal dumping near dumpsters, and graffiti in progress.

Beyond detection, the best systems offer natural language search of recorded footage. Instead of manually scrubbing through hours of DVR recordings, property managers can search for “person in red jacket near building 3” or “silver sedan in parking lot between midnight and 3 AM” and get results in seconds. This capability alone saves 3 to 5 hours per week at active properties.

The shift from reactive to proactive changes the economics of property security. Instead of paying for the consequences of undetected incidents — insurance claims, tenant turnover, repair costs — you're paying a fraction of that to prevent them. One prevented catalytic converter theft ($1,500 to $3,000 per incident) or one avoided unit turnover ($3,000 to $5,000 in vacancy and make-ready costs) can offset months of monitoring fees.

7. How to decide which approach fits your property

There's no single right answer. The best approach depends on where your property sits today:

For most stabilized Class B and C multifamily assets, the edge device approach offers the best ratio of capability to cost. Your cameras already work. Your DVR already records. The missing piece is the intelligence layer that turns passive recording into active monitoring — and that layer doesn't require ripping out anything.

Whatever you choose, the important thing is closing the monitoring gap. Every day your cameras record without anyone or anything watching is a day where incidents go undetected, response times are measured in hours instead of minutes, and your security investment underperforms. The technology to fix this exists today, at every price point, for every property type.