If you have been quoted for twelve cameras on an ordinary independent house, you are probably being oversold. Most independent homes are properly covered by four to eight cameras. The number depends on how many ways there are into your property, not on how big the house is.
Here is how to work out your own number, and what to check in a quote.
Count entry points, not rooms
Every intruder has to physically enter through something. Walk your property and list every way in:
- The main gate
- The front door
- Any rear or service entrance
- Side gates
- Ground-floor windows that are reachable from outside
- The parking area or car porch
- Any low compound wall someone could climb
Most independent houses come to four to six real entry points. That list, not the size of the house, is what determines your camera count.
Cameras do three different jobs, and they cost differently
This is the distinction that separates a designed system from a sold one. There are three levels of coverage, and each needs a different camera position:
Detection — you can see that a person is there and what they did. A wide shot from a roof corner does this fine.
Recognition — you can tell it was somebody you know. Needs the person larger in the frame, so the camera is closer or narrower.
Identification — you can identify a stranger you have never seen, well enough for a police complaint. Needs a camera at roughly face height, close to a choke point the person has to pass through, with controlled lighting.
You do not need identification-grade coverage everywhere. You need it at the gate and the front door — the two points everyone must pass. Elsewhere, detection is enough.
A quote with twelve identical cameras at twelve identical roof-corner positions gives you twelve detection shots and zero identification shots. It is more expensive and less useful than six cameras placed deliberately.
A worked example
A typical independent house in Dombivli — compound wall, gate, car porch, front door, rear kitchen entrance:
| Position | Job | Why |
|---|---|---|
| Main gate, at ~5ft | Identification | Everyone passes here. Face height, not roof height. |
| Gate, wide angle | Detection | Covers the approach and the vehicle. |
| Front door | Identification | Pair with a video door phone so you can also screen visitors live. |
| Rear/service entrance | Identification | The most commonly uncovered point, and the most commonly used. |
| Car porch / parking | Detection + plate | Angled to read a number plate, which is a different position from general coverage. |
| Compound rear corner | Detection | Covers the boundary and blind side. |
That is six cameras. Adding six more to the same house mostly adds overlapping detection coverage of areas already visible — and halves your retention.
The trade-off nobody explains
Every camera writes to the same hard disk. So:
More cameras, at higher resolution, on the same disk = fewer days of footage kept.
This matters more than most people realise, because incidents are frequently noticed late. A missing item, a damaged vehicle, a delivery that never arrived — these often surface a week or two after the fact. If your system keeps eight days of footage, an incident noticed on day ten is simply gone.
Before you accept any quote, ask one question: “How many days of footage will this system keep?” If the installer cannot answer with a number, they have not designed the system — they have priced a bill of materials.
What to check in a quote
- Is the camera count justified per position? A good quote lists what each camera covers, not just a total.
- Is retention stated in days? Not “1TB hard disk” — days.
- Are gate and door cameras at face height? Roof-corner-only is a red flag.
- Is night performance addressed? Infrared has a genuine range limit and reflects badly off nearby walls and glass. Ask what happens at 2am, not at noon.
- Is there backup power? Without it, a power cut is a gap in your recording.
When you might genuinely need more than eight
Large plots with long boundary walls, houses with multiple independent entrances, or properties with separate outbuildings and staff quarters. In those cases the entry-point count really is higher, and so is the camera count. The test is still the same: can you name what each camera is for?
And when you need fewer
If you live in a secure gated society with a manned gate and controlled entry, your property already has a layer of protection. A doorbell camera and one gate camera may be genuinely sufficient. We will tell you that rather than quote you a recorder — it costs us a sale and saves you money you did not need to spend.
Related questions
Is 4 cameras enough for a 2BHK independent house?
For a compact independent house with one gate and one rear access, four correctly placed cameras usually cover it: gate, front door, rear entrance and parking. The constraint is entry points and sightlines, not the number of bedrooms.
Do I need a camera inside the house?
Most families decide against it, and we do not push for it. Indoor cameras create their own privacy problems within a household, and the entry points outside are where an intruder has to pass. The common exception is a single camera covering the main door from inside, for households with domestic staff.
Will adding more cameras reduce how long footage is kept?
Yes, directly. Every camera writes to the same disk. Doubling the camera count roughly halves your retention days at the same resolution and disk size. This is the trade-off most quotes never spell out.