A compact shop or office often lands around 6–8 cameras; a larger business with stock rooms, rear access and parking may need 9–16. Count security objectives and capture points—not rooms—and use separate overview and identification views where one camera cannot do both jobs well.
The points that change the decision
- Define whether each view needs detection, recognition or identification.
- Give entrances, tills and controlled exits dedicated capture views.
- Use overview cameras for context and tighter views for usable facial or transaction detail.
- Size PoE, NVR channels, storage and backup power with expansion headroom.
Camera count begins with the incident you need to resolve
‘Cover the shop’ is not a testable requirement. A better brief asks whether staff need to detect after-hours movement, recognise a regular visitor, identify an unknown person at the entrance, verify cash handling, read a number plate or reconstruct movement between rooms.
The required detail determines lens, distance, angle and lighting. A wide camera that shows an entire floor may not place enough pixels across a face at the door. That is why a dedicated capture camera often sits beside an overview camera.
A practical zone-by-zone count
Walk the business from public approach to the most valuable asset. Every camera should have one primary job, even if it also provides useful secondary coverage.
| Security zone | Typical cameras | Primary outcome | Common mistake |
|---|---|---|---|
| Main entrance | 1–2 | Identification at a controlled capture point plus approach context | Mounting too high or facing bright daylight |
| Till / POS | 1–2 | Hands, transaction area and participant context | One ceiling overview with no usable detail |
| Customer / work floor | 2–4 | Movement and incident reconstruction | Blind spots behind shelves or partitions |
| Stock room / server room | 1–2 | Access and asset handling | No camera at the only door |
| Rear door / service lane | 1–2 | Entry, delivery and after-hours activity | Ignoring the lower-traffic entrance |
| Parking / perimeter | 2–4 | Detection and route context | Expecting one ultra-wide camera to identify everyone |
Three small-business planning profiles
A compact shop with one entrance, one till, one open floor and a stock room may start with six cameras: entrance identification, front approach, till, two floor views and stock access. A professional office with reception, corridors, server room and parking may use eight to twelve. A warehouse with loading, aisles and perimeter can move beyond sixteen quickly.
Do not force the design into an eight-channel recorder because eight sounds standard. If the survey identifies eight cameras today, a 16-channel NVR can provide sensible expansion and avoid replacing the recorder when one blind spot appears later.
Image usability depends on more than megapixels
Axis summarises surveillance outcomes as detection, observation, recognition and identification. Its IEC-based pixel-density guide shows why tighter fields of view are needed as the required outcome rises. Resolution without enough subject pixels, correct shutter, good light and sensible angle does not create evidence.
Test day, night and backlit conditions. Use wide-dynamic-range capability at bright entrances, infrared or appropriate lighting where needed, and avoid aiming infrared through glass. Privacy masks and access controls should be planned for neighbouring property and staff-sensitive areas.
- Mark camera direction and field of view on a floor plan.
- Capture test clips from the final mounting position.
- Confirm faces remain usable when people wear caps or approach from the side.
- Document retention, user access, export and time synchronisation.
Recorder, storage, network and power complete the system
Camera quantity sets the minimum NVR and PoE port count, but bitrate, codec, frame rate, activity and retention determine storage. Motion-only recording can save capacity but must include enough pre-event and post-event footage to explain what happened.
Back up cameras, PoE switch, recorder, router and any display required during an incident. Local recording should continue if the internet fails; remote viewing is a separate dependency. Keep admin accounts unique, update firmware and test video export before an emergency.
An eight-camera neighbourhood pharmacy
The business has one public entrance, two tills, three shelving aisles, a controlled medicine store and a rear delivery door.
Build my CCTV plan
Select property profile, indoor/outdoor zones, special cameras, retention and storage assumptions.
Primary sources used
Manufacturer and official Nigerian sources support technical or market claims. Worked examples remain SFP Technologies planning scenarios, not product guarantees.
Axis pixel density and DORI guidance
Official 2026 explanation of detection, observation, recognition and identification detail.
Official source ↗Axis site survey considerations
Official guidance on capture points, placement and separate overview/identification views.
Official source ↗AXIS Site Designer
Official design workflow for coverage, bandwidth and storage planning.
Frequently asked questions
Are four cameras enough for a small shop?＋
They may provide basic entrance, till and overview coverage, but rear access, stock and blind spots are often missed. Map each required outcome before accepting four as sufficient.
Is one 360-degree camera better than four cameras?＋
It can be excellent for overview in the right environment, but it may not provide identification detail at entrances or tills. Wide context and tight capture are different jobs.
How many days should CCTV be stored?＋
Choose retention from incident discovery time, business risk, policy and any applicable legal requirements. Then calculate bitrate-based storage with overhead and test actual recording settings.