The fastest way to overspend on cameras is to count corners. The fastest way to underspend is to buy a package and spread it around. A better approach is to decide what you need to see, where, and how clearly, and let that set the count.
1. List the places that matter
Walk the building and mark every spot where you would want footage after an incident. For most businesses the list starts here:
- Every entrance and exit, including loading docks and emergency doors.
- Parking lots and drive lanes, especially where vehicles enter.
- Registers, cash offices and high-value storage.
- Main hallways and stairwells that connect those areas.
- Server rooms and telecom closets.
2. Decide how much detail each spot needs
A camera that shows a person walked through a lot is different from one that can identify their face. Security designers often use four levels, from the IEC 62676-4 standard, measured in pixels per meter of the scene:
| Level | What you can tell | Typical place |
|---|---|---|
| Detect | Someone or something is there | Perimeter, open lots |
| Observe | What a person is doing | Hallways, warehouse aisles |
| Recognize | Whether it is someone you know | Lobbies, common areas |
| Identify | Who it is, beyond reasonable doubt | Entrances, registers |
The higher the level, the narrower the view one camera can cover. That is why entrances often get their own camera even when a wide-angle camera already sees the door.
3. Count the cameras
With the places and detail levels marked, count one camera per view. A wide lot may need several cameras for identification at the entry lane but one for general detection across the rest. Account for lighting too: glare from a glass door or a dark corner can change which camera fits.
4. Plan the cabling with the cameras
Most business cameras today are IP cameras powered over the network cable (PoE). Each one needs its own cable run back to a network switch, and each copper run can be at most 100 meters. Long runs to a far corner of a lot or a separate building may need an intermediate switch or fiber. Planning the cabling with the camera layout avoids surprises in the bid.
5. Get a walkthrough
A site visit turns a rough count into a real one. J&M Connections installs CCTV, access control and burglar alarm systems, and cables them with the same certified team that builds your network. See our security services or request a bid and choose “Not sure — I need a walkthrough”.