How to design CCTV for a retail store: coverage and recording
Plan camera coverage for entrances, tills and stockrooms, choose useful views and size recording capacity around the store's actual risks and operations.
A retail CCTV system should be designed around the incidents staff may need to review, not around a target number of cameras. The floor plan, lighting, mounting height and recording retention period all determine whether footage will be useful.
Start with risks and tasks
Walk through the premises with a floor plan before choosing equipment. Mark entrances and exits, tills, high-value merchandise, goods reception and stockroom access. For each position, decide what the footage must show: someone's presence, their route through the store or a specific detail. These are different viewing tasks and may need different camera positions.
Do not expect one camera to do every job. A wide view provides context, while a tighter view can capture detail at a particular point. Balance coverage against obstructions, lighting and privacy.
Choose the camera position and lens
Focal length alone does not determine the result. Sensor size, distance to the subject and required field of view also matter. Check the actual scene against the model's technical specifications, then test the view from the proposed mounting position before completing the installation.
- Entrances: check backlighting from doors and shop windows at different times of day.
- Tills: frame the working area rather than relying on a distant overview.
- Aisles and shelves: look for tall shelving, signs and displays that may obstruct the view.
- Stockrooms and deliveries: cover the relevant routes and check for blind spots behind open doors.
Test once in daylight and again under the lighting used at night or during closing. Day/night mode, dynamic range and infrared performance vary by model; confirm how the chosen camera behaves in the real store.
Size recording for the project
There is no universal retention period that suits every store. First establish the period the operation needs and check applicable legal requirements. Then estimate storage from the configured bitrate, recording hours and recording mode (continuous or event-based). Include the number of cameras and a reasonable allowance for growth, and compare the result with the recorder's usable capacity.
Document who may access footage, how an incident is exported and what happens if a connection or drive fails. In Spain, check data-protection and signage obligations with official sources or specialist advice before putting the system into service.
Handover checklist
- Play back test scenes from entrances, tills and other risk areas.
- Check detail, reflections and backlighting at different times of day.
- Test playback, search and export from the workstation staff will use.
- Confirm the observed retention period after several days of operation.
- Record the floor plan, configuration and people responsible for the system.
How many cameras does a store need?
Enough to cover the defined tasks with suitable views, without expecting one isolated camera to perform incompatible jobs. A floor plan and on-site tests give a more reliable estimate than a rule based only on floor area.
Which matters more: resolution or placement?
Both matter, but high resolution cannot fix the wrong angle, a backlit scene or a subject that is too far away. Validate the view first, then select the resolution and lens needed for the required level of detail.
