10 common security gaps in multi-unit properties (and how to close them)

10 common security gaps in multi-unit properties

The ten security gaps that recur across multi-unit residential are: unmonitored side and service entries, thin common-area coverage, key-based access nobody can revoke, dark or unwatched parking, no visitor management, fragmented emergency comms, package-theft exposure, blind stairwells and elevators, weak ground-floor perimeter, and short or unreliable footage retention. Each one shows up in premises-liability complaints. Each one has a fix that doesn't require ripping out the whole stack: cloud access control, AI camera analytics on existing fleets, and a package-room workflow that actually works.

The ten gaps, in the order they bite

We get called for incident reviews on multi-unit properties roughly twice a month. Garden-style, mid-rise, mixed-use, condo. The ten gaps below show up over and over, in the same rough order of how often they cause real losses. Each item flags the fix and the rough budget bucket, so you can sequence work over two or three cycles instead of trying to do everything at once.

1. Unmonitored side and service entries

The front lobby has a camera. The east-side door tenants prop open for cigarettes does not. The trash-room door the maintenance contractor wedges open at 7 AM does not. Most multi-unit incidents enter through a door nobody is watching. The fix is a camera at every shared exterior door plus a door-held-open alert on the access-control system. Brivo and Avigilon Alta ship the alert natively.

2. Thin common-area coverage

Hallways, laundry rooms, gyms, mailbox rooms. The places residents spend non-trivial time and where most tenant-on-tenant or staff-on-tenant complaints originate. The cost objection is real (10 to 30 cameras for a typical garden-style property), but the litigation cost of one missed incident dwarfs it. Most properties get there over two cycles, not one.

3. Key-based access nobody can revoke

A tenant moves out and keeps a copy. A maintenance vendor's master key walks off in a shift change. Mechanical keys produce zero audit trail and infinite duplication risk. Cloud access control (Brivo, Avigilon Alta, Kisi) replaces this with mobile or fob credentials that can be revoked instantly and logged on every entry. The migration takes a phased month, not a year.

4. Dark or unwatched parking

Auto break-ins, assault, and vandalism concentrate in lots with poor lighting and no real-time monitoring. The 2024 NHTSA data on parking-lot crime puts it second only to residences for property crime location. The fix layers thermal cameras at the perimeter, starlight at chokepoints, AI license-plate recognition at entries, and pole-mounted LED lighting at the dark corners.

5. No visitor management

Tailgaters walk in behind a tenant and head wherever they want. Door-prop alerts catch some of this; a real visitor-management workflow catches more. Cloud access systems can integrate with property-management software where the platform supports it, so leasing-office staff can pre-register guests, send a one-time mobile credential, and log every entry. The added friction is small; the audit trail is large.

6. Fragmented emergency comms

When something goes wrong, the on-call manager learns about it from a tenant call, the police arrive without context, and footage retrieval starts at sunrise. The fix is alarm-to-clip routing on the cloud VMS so the on-call manager sees the relevant clip the moment the alert fires, plus a documented escalation tree from front desk to property manager to ownership.

7. Package theft exposure

Porch piracy isn't just a single-family problem. Multi-unit lobbies and mailrooms are high-volume drop targets. Amazon Hub Apartment Locker and Luxer One are two integration paths; both work with cloud access systems. For properties without locker budget, a monitored package alcove with a Verkada or Avigilon camera and motion alerting cuts incidents by 70 to 90 percent.

8. Blind stairwells and elevators

Confined-space areas where assaults, drug activity, and code violations concentrate. Premises-liability complaints almost always cite the missing footage from the exact location of the incident. Wedge cameras (Axis, Hanwha, Verkada) handle elevator cabs in a single unit. Stairwells take a camera per landing on the most-trafficked stairs.

9. Weak ground-floor perimeter

Ground-floor windows, accessible landscaping, and dumpster enclosures are the perimeter equivalent of a propped door. Trim the bushes that block sightlines. Add cameras with motion classification at the back of the property and the dumpster zone. AI motion classification (Verkada, Avigilon Alta, Hanwha on-camera) keeps alerts to person and vehicle, not raccoons.

10. Short or unreliable footage retention

30 days is the floor; 90 days is what the carriers and plaintiffs' attorneys actually pull on. Legacy NVR installs lose footage to bad drives, full disks, or a power blip. Cloud-managed VMS (Verkada, Eagle Eye Networks, Avigilon Alta, Rhombus) handles 90-day retention without on-prem storage management. Tec-Tel monitoring agents handle the retrieval requests as a standard inclusion.

What this costs when you ignore it

Premises-liability claims at multi-unit properties commonly settle between $50K and $1M depending on the injury, the jurisdiction, and the documented response. Insurance renewals get hit by 15 to 30 percent after a documented loss with thin evidence. Tenant turnover at a property with a documented assault, a documented break-in pattern, or a public review citing security runs higher than the comparable inventory in the same submarket.

None of those numbers are arguments to redo every camera in one quarter. They're the math behind sequencing the work. Ground-floor doors and package room first. Lobby and parking second. Stairwells and elevator cabs third. Cloud access control across all of it. The free consultation gives you the list and the budget in writing.

Frequent buyer questions

What's the single highest-impact fix for a multi-unit property with an old security stack?

Cloud access control on every shared door. Brivo, Avigilon Alta, and Kisi all replace mechanical keys with mobile or fob credentials that can be revoked instantly when a tenant moves out. The same install gives the property manager an audit log of every entry, which is what insurance carriers and plaintiffs' attorneys ask for after an incident. Cameras matter, but doors are where the liability conversation starts. Most retrofits land at $400 to $900 per door installed.

How do we stop package theft without hiring concierge staff?

A monitored package room with a camera covering the door, an access-control reader on the entry, and a delivery-driver process that the carriers actually follow. Amazon Hub Apartment Locker and Luxer One are the two common drop-in solutions; both integrate with cloud access systems. For properties without budget for a locker, the lower-cost path is a dedicated package alcove with a Verkada or Avigilon camera, motion-triggered alerting, and a sign that drivers will photograph the drop. The combination cuts package-theft incidents by 70 to 90 percent in the buildings we've installed it in.

Do we really need cameras in stairwells and elevators?

Yes, and surveyors know it. Stairwells and elevator cabs are confined-space areas where assaults, drug activity, and code violations concentrate. Premises-liability complaints almost always cite the missing footage from the exact location where the incident happened. Modern wedge cameras (Axis, Hanwha, Verkada) handle elevator cabs with one unit and a low-voltage cable run; stairwells take a camera per landing on the most-trafficked stairs. Add this to the next cycle, not the next decade.

How long should multi-unit residential keep footage?

30 days minimum, 90 days if the property has any commercial component, dealings with finance carriers, or a history of premises-liability claims. The point isn't compliance; it's that incidents take days to surface. A tenant reports a missing package on day 12, an assault claim filed on day 25, an HR complaint about the leasing office on day 40. Cloud-managed VMS systems (Verkada, Eagle Eye Networks, Avigilon Alta) handle 90-day retention without on-prem storage management. NVR systems require sized hard drives and a maintenance contract.

What does a real fix-it plan cost for a 200-unit property?

Three line items, scaled to property size. Cloud access control on shared doors, $400 to $900 per door installed, typically $15K to $40K for a 200-unit. Camera upgrades at the gap zones (lobby, package room, parking, stairwells), $1,500 to $3,500 per camera, typically $30K to $80K for a phased rollout. Cloud VMS with 90-day retention, $30 to $60 per camera per month. The free consultation produces a written gap list with line-item budget; we walk the property with property management and document what's actually broken before anybody quotes anything.

Walk us through your property. We'll bring the gap list.

Free working session with our team. Bring the floor plan, recent incident reports, and a list of doors and cameras. Output: a written gap list with phased budget.

Tell us how many sites you run and what's already in place. We'll show you what a build or upgrade looks like.

Straight answers from the team that does the work. We're platform-agnostic, so you get the system that fits your sites, not one brand's catalog.

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