How Many Cameras
Does A House Need?
The honest answer is fewer than the salesperson wants to sell you — and placed far more deliberately. It's about covering the right spots, not blanketing every wall.
Ask the internet how many cameras your house needs and you'll get a number pulled from thin air, usually a big one. The truth is that placement beats count every time. Four cameras in the right spots outperform ten in the wrong ones — and cost a lot less.
Here's how to think about it the way we do when we design a system: start with how someone actually reaches your house.
The Spots That Matter
Where The Cameras Actually Go
Nearly every home comes down to the same handful of critical points. Cover these and you've covered the real risk:
- The front door & porch. The most-used entrance and where packages land — a video doorbell ($369) at the door plus a wider camera on the approach.
- The back or side door. The entrance intruders actually prefer, because it's out of sight. Arguably more important than the front.
- The driveway & garage. Vehicles, the garage approach, and anyone circling the house — usually one camera ($379) covers it.
- Any blind approach. The side yard, the gate, the dark corner — the unwatched path someone would take to reach a window unseen.
That's typically four to eight cameras for a whole house — the low end for a modest home, the high end for a larger property with more approaches. Add indoor cameras only where you want eyes on a main living area or an entry from the inside.
The Trap
Why More Isn't Better
It's tempting to think coverage is a numbers game — more cameras, more safety. It isn't. Ten cameras that all watch the front yard leave the back door wide open. And every camera you add is another feed to power, record, and store, which drives up the cost of the recorder and the drive behind them.
The goal is overlapping coverage of the ways in — so there's no path to your house that isn't seen — with the fewest cameras that achieve it. That's a design decision, not a shopping-cart decision. It also pairs directly with perimeter detection: cameras see, sensors trigger, and together they cover the approach.
The Options
What It Costs
- Ajax AI Cameras — $379 each. 4K outdoor coverage for entrances and approaches.
- Ajax DoorBell — $369. The front-door camera with two-way audio.
- Ajax IndoorCam — $289. For a main living area or interior entry.
Keep Reading
Related Guides
- Bullet vs turret vs dome — which camera type for each spot
- Do you need an NVR? — the recorder that stores it all
- How many motion sensors you need — the same logic, for the alarm side
Want The Right Cameras
In The Right Places?
Send us your property — the doors, the driveway, the blind corners — and we'll map the fewest cameras that leave no way in unwatched. Placement first, count second.