Should I count square footage or doors?

Doors, windows and approach paths — square footage is close to irrelevant. A 3,000 sq ft house with two exterior doors and a single driveway needs fewer cameras than a 1,400 sq ft house on a corner lot with a front door, a side gate, a back slider and an alley. Walk the perimeter and mark every point a person could get in or approach unseen. That list, not the floor plan, is your camera count.

Do I need indoor cameras as well?

Only if you have a specific reason, because indoor cameras carry privacy costs that outdoor ones do not. The usual justifications are a pet you want to check on, a main hallway that everything must pass through, or a room with valuables. If you do install one, put it where it covers a chokepoint rather than a bedroom or bathroom, tell everyone living there it exists, and use a camera with a physical shutter or a clear privacy mode.

Is one camera better than none?

Considerably, and the front door is the one to buy. A doorbell camera covers the approach used by package thieves and by a large share of burglars, records deliveries, and gives you a face at the door. It is also the cheapest way to find out whether you want more. Households almost always start here and add cameras outward, which is a more sensible sequence than buying a six-camera kit and discovering that three of them watch a fence.

Do more cameras mean higher subscription costs?

Usually, and this is where camera counts get expensive. Most brands price cloud plans either per camera or by tiers that cap the number of devices, so going from three to six cameras can double a monthly bill. Brands with an unlimited-camera household plan, or cameras that record to a local card or recorder, change the arithmetic entirely. Work out the five-year subscription cost before you settle on a count.

Can one camera cover two sides of the house?

A corner-mounted camera with a wide field of view can cover two approaches, but the trade is identification distance. Spreading a fixed sensor across a wider angle means fewer pixels on any given face, so you get a record that something happened without a usable description. If the corner is a genuine chokepoint the compromise can be worth it; if you need to recognize a person, use a narrower angle and accept that you need another camera.

How Many Cameras Do I Need for My House? (3

Written & researched by Derek Holt Home & Appliances Editor

Updated October 2026

Low-angle view of a person mounting a small camera beside a front door, in warm late-afternoon light

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Three to six cameras cover most single-family homes: one on the front door, one on the back door, one on the driveway or garage, and one on whichever side has no windows overlooking it. The number is set by entry points and approach paths, not by square footage. Count every exterior door, every ground-floor window a person could reach, and every route onto the property, then group them into scenes a single camera can watch. A townhouse often needs two. A corner lot with an alley and a detached garage can need eight.

How do you work out your own number?

Walk the perimeter once with a notepad and answer four questions. This takes fifteen minutes and saves buying a kit that watches the wrong things.

Where can someone get in? Every exterior door and every ground-floor window. Research from the University of North Carolina at Charlotte, which surveyed convicted burglars for the Alarm Industry Research and Educational Foundation, found offenders overwhelmingly favor doors and first-floor windows over anything requiring a climb.
Where can someone approach unseen? Side yards between houses, fence gates, alleys, and anything screened by hedging.
Where do deliveries land? Porch theft is the most common thing a home camera will ever record.
Where do you need to recognize a face rather than see movement? Those spots need a camera close and narrow, not a wide one far away.

Three-quarter view of a person mounting a small camera beside a front door, in warm late-afternoon light

How many cameras by house type?

These are starting points from the layouts most US homes fall into. Adjust up for corner lots, detached structures and long driveways.

Home type	Cameras	Where they go
Apartment or condo	1	Entry door, usually a doorbell camera
Townhouse, shared walls	2	Front door, rear patio or slider
Small single-story, one driveway	3	Front door, back door, driveway
Typical two-story, 1,800–2,500 sq ft	4–5	Add the blind side yard and the garage
Corner lot or alley access	5–6	Add the second street frontage and the gate
Detached garage or shop	+1–2	Its own door and the path to it
Acreage, long driveway	6–8	Add a gate or driveway-entrance camera

Golden-hour view of a person mounting a small camera beside a front door

Where should each one actually go?

Placement decides whether a camera produces evidence or a blurry shape. Mount at 8 to 10 feet — high enough to be out of easy reach, low enough that faces are not all forehead. Aim across an approach path rather than straight down it, so a person is in frame for several seconds instead of one. Avoid pointing into the rising or setting sun, which blows out the exposure twice a day.

Front door. A doorbell camera, because it sees the face at the closest range you will ever get.
Back door or patio slider. The second most used entry point and usually the least overlooked by neighbors.
Driveway. Wide angle, positioned to catch vehicles and plates as they turn in, not head-on at night when headlights blind the sensor.
Blind side yard. The narrow gap between houses, where a camera with good night range earns its place.
Garage interior. Cheap, indoors, and covers the tools and bikes that actually get taken.

Night coverage is the constraint people underestimate: a camera that identifies a face at 15 feet in daylight may only detect motion at that range after dark, which is why the figures in how far a security camera sees at night matter more than the marketing range. Mounting height and cable routing are covered in how to mount outdoor security cameras.

Before settling on a count, price the subscription. Plans that charge per camera make a six-camera system permanently expensive, which is why the local-storage options in cameras without a subscription are worth reading first. The models owners rate most highly for night performance and reliable notifications are in our home security camera picks.

We never buy, install or physically handle the products we rank. Every recommendation comes from aggregated owner reviews, star ratings, review volume and published expert consensus — see how we rank.

How Many Cameras Do I Need for My House?

Affiliate Disclosure

How do you work out your own number?

How many cameras by house type?

Where should each one actually go?

Frequently Asked