
How Many CCTV Cameras Do You Need for Your Home? — Expert Guide
Not sure how many cameras to install at home? Our CCTV experts walk you through every room, entry point, and blind-spot calculation so you get full coverage without overspending.

A home CCTV system primarily detects intrusion — the threat is largely nocturnal and comes from outside. A commercial system must handle something far more complex: continuous daytime activity, mixed indoor and outdoor coverage, employee accountability, customer dispute resolution, and often the need to produce footage as legal evidence.
At CCTVPROS Kottayam, we install commercial systems across retail shops, supermarkets, textile showrooms, medical stores, bank branches, corporate offices, warehouses, and petrol bunks throughout Kottayam, Changanacherry, Pala, Ettumanoor, Vaikom, and Kanjirappally. Here's exactly what you need to know before investing.
This is the single most important camera in any retail business. It must capture the cashier's hands, the cash tray, the customer's face, and ideally the POS screen. Use a 4MP or higher dome camera with a 2.8 mm wide-angle lens positioned 2–2.5 metres directly above or behind the billing counter. Enable a separate recording zone or higher frame rate (25 fps vs default 15 fps) for this camera.
A camera at the entrance captures every person entering and exiting. This is critical for identifying suspects after a theft. Mount it at 2.5–3 metres height, facing inward, with backlight compensation enabled so faces aren't silhouetted against daylight. Use a 4MP bullet or dome with WDR (Wide Dynamic Range) to handle bright doorways.
Electronics, gold jewellery, premium textiles, spirits, and pharmaceuticals warrant dedicated cameras. A single camera per aisle or display cabinet, positioned to capture product removal from shelves, prevents both customer theft and internal pilferage. Varifocal cameras (2.8–12 mm adjustable lens) work best for narrow shop aisles.
Rear stock rooms and office areas where petty cash, inventory, or sensitive documents are stored need at least one camera. This also covers employer-employee disputes, prevents inventory shrinkage, and protects against false claims.
| Business Type | Cameras Needed | Recommended System | Approx. Cost (Installed) |
|---|---|---|---|
| Small shop / medical store | 4 | HD Analogue (4MP + DVR) | ₹22,000 |
| Small shop / medical store | 4 | IP Camera (4MP + NVR) | ₹28,000 |
| Supermarket / textile showroom | 8 | HD Analogue (4MP + 8ch DVR) | ₹38,000 |
| Supermarket / textile showroom | 8 | IP Camera (4MP + PoE NVR) | ₹48,000 |
| Corporate office / warehouse | 16 | HD Analogue (4MP + 16ch DVR) | ₹65,000 |
| Corporate office / warehouse | 16 | IP Camera (4MP + 16ch NVR) | ₹80,000 |
Kerala Police and courts increasingly require CCTV footage as primary evidence in theft, assault, and dispute cases. For footage to be useful as evidence, it must clearly show:
This requires a minimum of 4MP (2560×1440) resolution for cameras more than 4 metres from the subject. 2MP cameras work at close range (1–3 metres) but fail for face identification at typical shop distances. We strongly recommend 4MP or 5MP cameras for all commercial installations.
Under Kerala Police advisory, commercial establishments in Kerala should retain CCTV footage for a minimum of 30 days. Calculating storage:
We recommend WD Purple Pro or Seagate SkyHawk hard drives — these are purpose-built for 24/7 surveillance write cycles and carry a 3-year warranty. Standard desktop or laptop hard drives fail within 6–12 months under continuous CCTV recording.
For corporate offices and multi-floor buildings, we recommend IP camera systems over NVR rather than traditional analog cameras over DVR. The reasons:
For single-floor shops under 400 sq ft, traditional DVR systems are more cost-effective. For multi-floor offices or buildings with existing structured cabling, IP/NVR is the clear choice.
Commercial CCTV systems require more maintenance than home systems because they run 24/7 in higher-traffic environments. Dust accumulation on camera domes, HDD wear from continuous recording, and firmware updates for security vulnerabilities all require periodic attention.
CCTVPROS offers commercial AMC plans starting from ₹1,500/year for up to 4 cameras, ₹2,500/year for up to 8 cameras, and ₹4,000/year for up to 16 cameras. Each plan includes:
Call +91 75999 85666 to discuss an AMC plan tailored to your business. We service all brands — Hikvision, Dahua, CP Plus, Bosch — even systems not installed by us.
Kerala Police's Safe City initiative encourages all commercial establishments to register their CCTV systems with the local police station. Key compliance points:
CCTVPROS provides a compliance checklist with every commercial installation to ensure your system meets all current requirements.
Contact CCTVPROS for a free commercial site survey. Our engineer will assess your shop or office, recommend the optimal camera positions, prepare a detailed quote, and advise on compliance. We serve all of Kottayam district — call +91 75999 85666 or WhatsApp wa.me/917599985666.
A small shop (under 500 sq ft) typically needs 4–6 cameras: entrance, cash counter, product displays, and storage/rear exit. Larger showrooms and supermarkets need 8–16 cameras depending on floor area and number of aisles.
For reliable facial identification at typical shop distances (3–8 metres), a minimum of 4MP resolution is recommended. 2MP cameras are sufficient only at close range (1–3 metres). Always ensure timestamp overlay is enabled.
Kerala Police advisory recommends commercial establishments retain CCTV footage for a minimum of 30 days. Some industries (banks, fuel stations) may have specific regulatory requirements up to 90 days.
For multi-floor offices or buildings with existing network infrastructure, IP cameras over NVR are preferred — they offer higher resolution, PoE simplicity, and better remote access. For single-floor small shops, analog over DVR is more cost-effective.
Use surveillance-grade hard drives such as WD Purple or Seagate SkyHawk. For 8 cameras at 4MP with 30-day retention, you need a 2–3 TB drive. Standard desktop drives are not rated for continuous 24/7 write cycles and fail quickly.
Yes. CCTVPROS provides AMC and repair service for all major brands including Hikvision, Dahua, CP Plus, and Bosch — regardless of who did the original installation. Call +91 75999 85666 to arrange a service visit.
Yes, CCTV in public-facing commercial premises is legal in India. You must display a visible notice that the area is under CCTV surveillance. Cameras cannot be placed in private areas (toilets, changing rooms). Employee monitoring cameras require staff awareness per IT Act provisions.
A complete 4-camera HD system installed in a shop in Kottayam costs ₹22,000 all-inclusive (cameras, DVR, 1 TB hard disk, cabling, and labour). The 4-camera IP package is ₹28,000. 8-camera HD systems are ₹38,000 and 8-camera IP systems are ₹48,000.
Professional CCTV camera installation service across Kottayam by certified technicians. We install HD, 4K, IP, and analog cameras for homes, shops, offices, and factories.
Learn MoreGet a free quote from CCTVPROS — Kottayam's #1 CCTV installation experts.

Not sure how many cameras to install at home? Our CCTV experts walk you through every room, entry point, and blind-spot calculation so you get full coverage without overspending.

Most CCTV systems fail silently — recording black screens or corrupted footage for months before anyone notices. An AMC keeps your system working when it matters most. Here's everything you need to know.