Where should you place home security cameras?

Start with entrances, not a camera count. For a detached home, the usual priorities are the route to the gate, the front door, side access and the door connecting the garage to the house.

Each view should answer a defined question. A wide garden shot may detect movement without capturing a useful face. The widest view may also include the street or a neighbour's property, which creates a different problem.

Map the risks before choosing hardware

Walk around the property as if you had never seen it. Note each practical route in, the places hidden from the house or street, and the doors or windows that lead straight into living areas.

Give every proposed camera one job: alert you to an arrival, show a face at the door, confirm that the gate closed, or cover a side passage. “See everything” is too vague to test.

This exercise also prevents overlapping views that add cost but little evidence. A home security design should connect each device to a risk and a response.

Cover access points first

At the front door, frame the approach and the face of someone waiting. Mounting a camera out of reach is useful, but an excessive downward angle may leave you with little more than the top of a head.

A doorbell camera and a wider overview can serve different purposes. One supports a conversation at the door; the other shows the route towards it and what happened immediately around the entrance.

At a vehicle gate, decide whether you need to recognise a person, confirm a vehicle or check that the gate closed. One very wide image seldom performs all three tasks equally well.

Side and rear access deserve attention when walls, planting or outbuildings hide them from view. Those same objects can reflect infrared light or trigger repeated motion alerts when they move in the wind.

Be more demanding before putting cameras indoors. A view across an entrance hall may help explain a break-in. A camera in a bedroom or main living area records ordinary family life. The privacy trade-off is not comparable.

Test the recorded result, day and night

Pixel count cannot rescue a tiny face, harsh backlighting or an over-compressed recording. Lens choice, distance, angle, lighting and recording quality determine whether the image is useful together.

Test each proposed position with someone walking the real route in daylight and after dark. Review the recording rather than relying on the live picture shown while the installer is standing beside the camera.

Look for a bright doorway behind a dark face, headlights at the gate, infrared glare from a nearby wall and areas that turn black while the camera exposes another part of the scene. Better lighting may beat a more expensive camera.

Rain, insects and planting matter too. A calm, clean test can turn into constant false alerts when leaves, droplets or spider webs move close to the lens.

In Portugal, the camera angle has legal limits

Portugal's data protection authority says an individual may use cameras to protect a private home without prior authorisation.

Its guidance on cameras installed by neighbours also sets clear boundaries.

The view should remain within the property and capture only what is strictly necessary around its entrances. It must not watch a neighbour's land, a shared right of way or people moving along the public street.

Article 19 of Law 58/2019 defines these limits and restricts audio capture. If a camera enables its microphone by default, do not assume that leaving it on is harmless.

Set the physical angle and lens first. Add privacy masks as another safeguard, and verify that they are applied to stored footage rather than only to the preview in the app.

Shared buildings are different. A resident should not independently place a camera in a landing, shared corridor or communal car park. The CNPD guidance states that an operating system requires the express agreement of all residents.

Plan power, networking and storage

A fixed camera needs power and a dependable route to its recorder. Wi-Fi removes the data cable, but it does not automatically solve power, radio interference or a thick wall between the camera and the nearest access point.

Where cabling is practical, PoE carries data and power over one connection and often makes a permanent installation easier to diagnose. The recorder, network switch and router still need a secure location and suitable power protection.

If the network also carries automation, work and household devices, cameras should be separated and access restricted. The network infrastructure is part of the security system, not an afterthought.

Compare local and cloud recording by examining failure cases. Ask whether recording continues without internet, how long footage is kept, how an incident is exported and which subscriptions or storage limits apply.

Use individual accounts, enable two-factor authentication where available and remove access that is no longer needed. One shared password makes it difficult to know who viewed, changed or exported footage.

The finished plan should answer six questions

Before installation, confirm:

• What event justifies each camera?
• Does this position need detection or a recognisable image?
• Which areas are deliberately excluded from view?
• Does recording continue without internet or mains power?
• Who can view, export and delete footage?
• Does the night test show useful detail along the real route?

In a home, a balanced system covers access points with a few deliberate views, protects private areas and defines what happens after an alert. Extra cameras help only when each closes a distinct gap.

Review my home's camera coverage. Tell us about the entrances, outdoor areas, existing cabling and whether you need recording alone or an integrated alarm and access-control system.