CCTV and Video Door Phones for Homes

Home security in India used to mean a watchman, a grille gate, a peephole and a neighbour who noticed strangers. Today it increasingly means cameras and a screen by the door. Families want to see who is ringing the bell before opening, to check on elders or children from the office, to know when a parcel was delivered, and to have a recording if something goes wrong. CCTV cameras and video door phones have become ordinary items in flats, row houses and bungalows, and their prices have fallen to the point where most new homes can include them from the start.

Yet many home systems disappoint. Cameras are mounted so high that they record the tops of heads; one camera faces a bright gate and shows only silhouettes; the night picture is a white glare because the infrared light bounces off a glass door; wires hang along the facade because no conduits were planned; the recorder sits in a dusty loft without backup power and stops during the very power cut when it was needed; and the default password is never changed. Most of these problems are planning problems, not equipment problems, and they are easiest to avoid before the walls are plastered.

This guide covers the decisions in order: which type of system to choose, which cameras and resolutions suit which positions, where and how high to mount cameras and door phones, how to wire them, how much storage to provide, how to respect privacy and keep the system secure, and what it all costs in October 2026.

From the peephole to the connected camera

The door viewer — the small wide-angle lens in the main door, often called a magic eye — and the buzzer or bell were the first home security tools in most Indian flats, followed by audio intercoms between the gate and the house in larger bungalows and apartment buildings. Closed-circuit television entered homes later, first as analogue cameras sending a standard-definition signal over coaxial cable to a digital video recorder (DVR). Those early pictures were too coarse to identify a face more than a few metres away.

Two changes made home CCTV useful. High-definition analogue formats allowed existing coaxial cabling to carry much sharper pictures, and network (IP) cameras sent digital video over ordinary network cable, powered through the same cable by Power over Ethernet (PoE), to a network video recorder (NVR). Smartphones then made remote viewing normal, and cheap Wi-Fi cameras and smart doorbells brought cameras to homes that had no wiring at all. Video door phones followed the same path, from analogue four-wire kits to two-wire and IP systems that ring a phone anywhere in the world.

Choosing the type of system

For a new bungalow or a full renovation, a wired IP system with PoE cameras and an NVR is usually the best choice: one network cable to each camera carries power and video, pictures are sharp, and cameras from different makers can often work together through common standards such as ONVIF. HD analogue systems remain a sound, economical choice where coaxial cabling already exists or where budgets are tight. Wi-Fi cameras suit rented flats, single doors and quick additions, but every camera needs power and a strong Wi-Fi signal, recording may depend on a memory card or a cloud subscription, and they are the first thing to fail when the router or the power goes off.

Cameras, lenses and the resolution that recognises a face

Cameras come in a few common shapes. Bullet cameras are cylindrical, visible and easy to aim, and suit gates and perimeters. Dome and turret cameras are compact and less obtrusive, suiting porches and ceilings; turrets avoid the night-time reflections that a dome cover can cause. Fisheye cameras see a whole room or courtyard from one point. Pan-tilt-zoom (PTZ) cameras can be steered and zoomed, but in homes they usually point the wrong way at the moment something happens. For most homes, fixed bullets and turrets are the right choice.

The lens and resolution together decide what a camera can show. A wide lens of about 2.8 mm on a typical camera sees a broad scene of roughly 90–110 degrees, useful for a porch, but spreads its pixels thinly; a narrower lens of 4–6 mm sees less but further. The international standard for video surveillance, IEC 62676-4, describes the detail needed in terms of pixels per metre of scene width: about 25 px/m to detect a person, 62.5 to observe, 125 to recognise a known person and 250 to identify a stranger. That gives a simple check: a 2 MP camera, with about 1920 pixels across, can identify faces only across a scene about 7.7 m wide; a 4 MP camera with about 2560 pixels, about 10 m. A camera covering a 20 m wide compound will record that something happened, but not who did it.

Night performance matters as much as resolution, because most incidents happen after dark. Infrared (IR) cameras see in black and white at night up to their rated IR range, typically 20–30 m for home bullets, but IR reflects strongly off glass, glossy tiles and nearby walls, and insects and cobwebs near the lens trigger false alarms. Colour night cameras use a sensitive sensor and sometimes a small warm-white light; they give useful colour pictures where there is some ambient light. Wide dynamic range (WDR) is essential for a camera looking out of a dark porch towards a bright gate, or the visitor will appear as a silhouette.

Where to place cameras in a home

Placement starts from a simple question: where would someone have to pass to enter? In a bungalow that usually means the gate, the path to the main door, the main door itself, the parking area, the side and rear passages, the back or utility door, and the terrace door. In a flat, it is mainly the main door and the corridor outside it (with the society's permission), and sometimes a balcony that can be reached from outside. Inside the home, cameras are optional and need careful thought about the privacy of family members and domestic staff; many families use one camera in the living area or near the entrance only, and none in bedrooms or bathrooms.

Fig. 1 shows a layout for a typical east-facing bungalow on a 40 × 60 ft plot. Camera C1, on the gate pillar or the compound wall, looks into the plot so that everyone entering is seen face-on; C2, beside the main door, looks out towards the gate and the path; C3 covers the parking and the gate from a different angle; C4 and C5 look along the side passages; and C6 covers the rear yard and the utility door. Each entry route is seen by at least two cameras, one of them close enough for identification. Six to eight cameras cover most bungalows; a flat usually needs one at the door, and perhaps one inside the entrance.

Heights and angles

Cameras mounted very high are hard to reach and tamper with, but they record the tops of heads. Cameras mounted low see faces but can be covered or turned. For homes, about 2400–3000 mm above the ground, tilted 15–30 degrees down, is a sensible balance, and it matches the height used for CCTV points in this site's electrical planning guides. Mount cameras under a projection or a chhajja where possible to shield them from rain and direct sun; avoid aiming them at the rising or setting sun, at bright gate lights or straight across glass. A face is most easily identified when the camera looks along the path a person walks, from a little above eye level, rather than from the side.

Video door phones

A video door phone (VDP) pairs an outdoor unit — camera, microphone, speaker and call button — with one or more indoor monitors. In a flat, the outdoor unit sits beside the main door; in a bungalow it is usually on the gate pillar, sometimes with a second unit at the main door. Most systems can release an electric lock or strike on the gate or door from the monitor, and many now ring a smartphone app when nobody is at home, so the family can speak to a delivery person or a guest from anywhere. Apartment buildings increasingly use networked intercoms in which the security desk, the lobby panel and each flat's monitor are connected.

The outdoor unit's camera should be at about the height of an adult's face, so that most visitors are seen face-on: a lens height of about 1450–1550 mm above the finished floor or ground is commonly used, mounted 150–300 mm from the door frame on the latch side. Children and wheelchair users are lower, so a camera with a wider vertical view or a slight downward tilt helps. Light the visitor's face from the front with a soft light at about 2200–2400 mm; a lamp behind the visitor, or a bright street light in the camera's view, turns the face into a silhouette. Under a deep canopy, the unit is also protected from rain.

The indoor monitor goes near the main door or in the living area, where whoever answers can see it and then go to the door; a screen centre height of about 1400–1500 mm suits most adults. Bungalows usually add a second monitor upstairs or rely on the phone app. Where the VDP releases a gate lock, choose a lock that stays locked during a power cut unless it is a fire-exit route, and check with the installer that the lock cannot be opened simply by tampering with the outdoor unit's wiring.

Wiring, power and the recorder

Wiring is the part most often left too late. For an IP system, each camera needs one Category 6 cable from its position to the PoE switch or NVR, run in a 20–25 mm PVC conduit concealed in the wall or slab, ending in a weatherproof junction box behind the camera. Ethernet runs are limited to about 100 m, which is ample for a home. HD analogue cameras need coaxial cable plus a power pair. The video door phone needs its own cable between the outdoor unit and each monitor, plus a cable to any electric lock. All of these should appear on the electrical drawing alongside the power points, as this site's electrical layout guide recommends, and the conduits should be laid before plastering.

The NVR is the heart of the system and the first thing an intruder looks for. It should sit inside the house in a ventilated, lockable cabinet — often a shelf in a study, a utility cupboard or the network cabinet next to the router — not in a loft that overheats, not in an outdoor box, and not in plain sight by the entrance. Put the NVR, the PoE switch (if separate) and the router on a UPS, so the cameras keep recording during a power cut; a small UPS of 600–1000 VA gives a useful backup time for a home system, and a larger inverter can carry it longer. Earth the system properly, add surge protection on cables that run outdoors, and follow the National Building Code of India 2016, Part 8, and IS 732 for the wiring itself — or simply ask a licensed electrician to do it.

How much storage, and for how long

Recording time depends on the number of cameras, their resolution, the compression and whether they record all the time or only on motion. Modern cameras use H.265 compression, which roughly halves the storage needed compared with the older H.264 at similar picture quality. As a planning figure, a 4 MP camera with H.265 at a typical home setting uses roughly 2–4 megabits per second; at 3 Mbps it fills about 32 GB per day when recording continuously. Four such cameras use about 130 GB per day, so a 4 TB surveillance-grade hard disk holds roughly a month. Motion-based recording stretches this considerably, but continuous recording avoids missing the moments just before an event. Use surveillance-rated disks, which are designed for continuous writing.

Privacy, neighbours and the society

Cameras protect a family, but they also record other people: domestic staff, visitors, neighbours and passers-by. The considerate and sensible approach is to aim cameras at the home's own entrances and compound, not at a neighbour's windows, balcony or private garden; to avoid cameras inside bedrooms and bathrooms; to tell domestic staff where cameras are; to keep audio recording off unless there is a clear reason; and to place a simple sign saying the premises are under camera surveillance. In a flat, a camera in the common corridor or one that views the lobby usually needs the housing society's permission, and many societies have their own rules on what residents may install outside their doors.

India's Digital Personal Data Protection Act, 2023 sets out obligations for processing digital personal data, and how such laws apply to a particular camera depends on its use and circumstances; families with concerns, and anyone installing cameras in a shared building or a home business, should seek qualified legal advice. This section is general information, not legal advice. Recordings should be accessible only to the family members who need them, kept for a limited period, and shared with others — such as the police — only when there is a genuine need.

Cyber safety

A camera connected to the internet is a small computer on the home network, and a poorly secured one can expose the family's video to strangers. Change every default password on the NVR, cameras, door phone and app; use the maker's app with two-step verification where available; update firmware regularly; disable remote features that are not used; and, where the router allows it, put cameras on a separate network from laptops and phones. Buy from established brands with a support presence in India, which are more likely to issue security updates, and check for BIS registration markings where applicable.

What CCTV and door phones cost in 2026

Costs depend on the number of cameras, resolution, brand, cable lengths and how much wall and conduit work is needed. The ranges below are indicative October 2026 figures for supplied and installed systems in Indian cities, excluding GST and any civil or painting work; they are consistent with the 4-camera kit range used in this site's shop Vastu guide and the door-phone starter set in its smart home guide.

Where home security systems are heading

Three trends are reshaping home systems. First, analytics on the camera itself: person and vehicle detection, line-crossing alerts and parcel detection reduce the flood of false alerts from trees, cats and headlights, and make notifications useful. Second, integration: door phones, smart locks, lights and cameras increasingly work together, so that a visitor at the gate turns on the porch light, the camera starts recording at high quality, and the family can see, speak and unlock from one app — the kind of focused package described in this site's smart home guide. Third, more scrutiny of privacy and security: governments, including India's, have been tightening testing and security requirements for connected cameras, and makers are adding encryption and local-only modes. Face recognition is also arriving in consumer products; families should think carefully about whether they need it, because it records sensitive personal data about everyone who passes.

For a new home, the most future-proof step is not a particular brand but good infrastructure: a conduit and network cable to every likely camera position, a ventilated cabinet for the recorder and router with power backup, and a door-phone cable to the gate and the main door. Cameras can then be replaced as technology improves, without breaking a single wall.

Rules for planning CCTV and a video door phone

• Plan camera, door phone and lock cables on the electrical drawing and lay conduits before plastering.
• Cover every entry route with two cameras, one close enough to identify a face (about 250 px/m).
• Mount cameras at 2400–3000 mm, tilted 15–30° down, under a projection, aimed along the path people walk.
• Use 4 MP or higher with narrower lenses at gates and long passages; wide lenses only for short scenes.
• Fit the VDP outdoor unit with its lens at about 1450–1550 mm and light the visitor's face from the front.
• Keep the NVR in a ventilated, lockable cabinet inside the house, on a UPS with the router and PoE switch.
• Provide storage for at least about 30 days, using surveillance-rated disks and H.265 compression.
• Aim cameras away from neighbours' private spaces, avoid bedrooms and bathrooms, and follow society rules.
• Change default passwords, enable two-step login, update firmware and keep cameras on a separate network.

Frequently asked questions

How many CCTV cameras does a house need?

A flat usually needs one camera at the main door, and perhaps one inside the entrance. A bungalow typically needs six to eight: the gate, the main door, parking, both side passages, the rear or utility door, and sometimes the terrace door. Each entry route should be covered by two cameras, one of them close enough to identify a face.

What is the right height to install a CCTV camera at home?

About 2400–3000 mm above the ground, tilted 15–30 degrees down, under a projection where possible. Higher cameras are safer from tampering but record the tops of heads; lower cameras see faces better but are easier to reach.

At what height should a video door phone be installed?

The outdoor unit is commonly installed with its camera lens at about 1450–1550 mm above the finished floor or ground, 150–300 mm from the door frame on the latch side. The indoor monitor is usually placed with its screen centre at about 1400–1500 mm near the main door.

Is a 2 MP camera enough for home CCTV?

For doors, porches and short passages, yes: a 2 MP camera can identify faces across a scene about 7.7 m wide. For gates, parking and long boundaries, 4 MP or higher with a suitable lens gives a much better chance of identifying a person, because it has more pixels across the scene.

How much storage does home CCTV need?

Four 4 MP cameras recording continuously with H.265 compression use roughly 130 GB a day, so a 4 TB surveillance disk holds about a month. Eight cameras need about 8 TB for a month. Motion-only recording reduces this, at the risk of missing the lead-up to an event.

Does CCTV work during a power cut?

Only if the recorder, the PoE switch and the router are on a UPS or an inverter. A small UPS of about 600–1000 VA keeps a typical home system recording for a useful period; without it, the system stops exactly when power cuts are most often exploited.