How to plan a CCTV installation for your home or business

Setting up a security camera system is a bigger project than most people expect. The technical part - mounting cameras and running cables - is often the smallest challenge. The real work happens before anyone picks up a drill. Getting the layout right, choosing the right equipment, and thinking through how the system will be used day to day makes the difference between a system that works and one that gathers dust.

A camera pointed at the wrong angle, a recorder placed where it can be unplugged, or a system that requires a degree in networking to view - these are common mistakes. The good news is that most of them are avoidable with a little forethought. This article walks through the practical steps of security camera planning so that the final installation does what it is supposed to do.

Start with what you want to protect

The first question is not which camera to buy. It is what exactly needs to be watched. Walk through the property and note every point where someone could enter: doors, ground-floor windows, garage doors, side gates. For a business, also think about stock rooms, server closets, and entrances that are not used often.

Once the entry points are listed, decide what level of detail matters. Is it enough to see that someone walked past, or must the camera capture a face clearly enough for identification? That difference changes the camera type, lens choice, and placement height. A camera mounted too high to catch a face is useful only for detecting motion, not for identifying people.

For a home, the front door and back door are usually the top priorities. For a business, the point of sale, delivery entrance, and any area where cash or stock is handled are the obvious starting points. But do not forget the blind spots - the alley next to the building, the parking area, the rooftop access point. Thieves often choose the path that is least visible.

Think about lighting and environment

Lighting changes everything for a security camera. A camera that works well in bright daylight may produce only grey shapes at night if the scene is poorly lit. Some cameras have built-in infrared LEDs that let them see in total darkness, but the range and quality vary a lot. Check whether the area has any ambient light from streetlights or building lights, and test how far the camera's own infrared can reach.

Glare is another issue. A camera pointed toward a rising or setting sun will be blinded for part of the day. Similarly, a camera looking directly into a bright security light may wash out the image. Plan the camera position so that the light source is behind the camera or off to the side.

Outdoor cameras must handle rain, dust, and temperature swings. Look for an IP rating of at least IP65 for outdoor use. For coastal areas, salt spray is hard on electronics, so a camera with a sealed housing and corrosion-resistant materials is worth the extra cost.

Where to place the recorder and network equipment

The digital video recorder (DVR) or network video recorder (NVR) is the heart of the system. It needs to be somewhere secure, ventilated, and near a power source and network connection. A locked cabinet in a utility room or office is ideal. Avoid putting it in an attic or garage where temperatures can damage the hard drive.

Think about physical security too. If someone breaks into the building, the first thing they might do is smash or steal the recorder. A hidden recorder or one that backs up video to a remote location gives an extra layer of protection. Many modern systems support cloud backup or can be set to record to a second location on the network.

Network cabling matters. If the cameras are wired, the cable run from each camera to the recorder must be within the distance limit for the cable type - usually about 100 metres for standard ethernet. If that is not possible, a switch or extender in the middle can help, but that adds complexity and another point of failure. Wireless cameras avoid the cable run but introduce bandwidth limits and potential interference. For a reliable system, wired connections are still the standard.

Camera placement: height and angle

The most common mistake in security camera planning is mounting cameras too high. A camera at roof level gets a wide view but does not capture facial detail. For identification, the camera needs to be low enough to see a face - usually around 2.5 to 3 metres high, angled slightly downward so it points at the person's face rather than the top of their head.

For general surveillance of a yard or parking lot, a higher mount with a wide-angle lens is fine. But for entry points, a second camera at a lower angle aimed at the door handle area is often worth adding. That second camera captures the person's face when they look down to unlock the door, which is a natural moment to get a clear shot.

Consider the field of view. A camera with a very wide angle (anything over 100 degrees) gives a broad view but makes objects far away look small. A narrower angle gives more detail at a distance. For most homes, a mix of wide-angle cameras for general coverage and narrower lenses for choke points works best.

Recording schedules and storage

Decide how long the recordings need to be kept. A week is common for homes, while businesses often keep footage for a month or longer. The storage capacity of the recorder and the number of cameras determine how long the system can store video. Higher resolution cameras and continuous recording eat through storage quickly. Motion-triggered recording saves space and makes it easier to find events later.

Many recorders let you set a schedule: record continuously during business hours and switch to motion-only at night. That balance gives you the coverage you need without filling the hard drive with hours of empty footage. Check the recorder's settings to see if it supports this kind of hybrid schedule.

Also think about what happens if the recorder hard drive fails. Some systems support RAID or a second hard drive for redundancy. Others let you set up a network share to copy footage to a NAS or a cloud service. Even a simple alert that notifies you when the drive is near full can prevent a gap in coverage.

Remote viewing and access control

Most modern systems allow remote viewing through a mobile app or web browser. That is convenient, but it also introduces security risks. The camera system should have a strong, unique password. Do not use the default password that comes with the device. Many security breaches of camera systems happen because the owner never changed the factory password.

If the system is connected to the internet, consider putting the cameras or the recorder on a separate network segment, like a guest network or a VLAN. That way, a vulnerability in the camera cannot give an attacker access to the rest of the network. Some routers have a setting for this; otherwise, a simple second network switch and a separate internet connection can achieve the same thing.

Remote access should use encryption. Look for a system that supports HTTPS for the web interface and uses SSL or similar for the app connection. If the system uses a peer-to-peer connection method with a QR code, that is usually secure enough for a home setup, but a business with sensitive data should consider a VPN instead.

Maintenance and testing

A security system is not a set-and-forget device. Cameras need their lenses cleaned every few months, especially outdoors. Spider webs, dust, and rain spots can blur a camera to the point where the footage is useless. Check each camera view on the monitor every month or two to catch problems early.

Firmware updates matter too. Camera manufacturers release updates that fix security holes and improve performance. Set a reminder to check for updates every quarter. Some systems can be set to update automatically, but check that the update does not break any custom settings.

Finally, test the system regularly. Simulate a break-in by walking past each camera while a colleague watches the monitor. Check that the motion detection triggers properly, that the recording starts and stops at the right times, and that the remote app shows the live view without delay. A system that passes this test once a year is a system you can rely on.

Security camera planning is not a one-time activity. As the property changes - new buildings, trees growing, lighting upgrades - the camera layout may need to adjust. Review the system every year and make small changes as needed. That keeps the coverage effective without requiring a full redesign.