Where they actually turn up
Hidden cameras tend to show up in two settings: a home someone else has access to (a partner, ex-partner, roommate, or landlord), and a short-term rental or hotel room. In a monitored home, cameras get built into everyday objects — smoke alarms, clocks, toys — because they’re the kind of object no one thinks to inspect (Safety Net Project / techsafety.org).
In rentals, the concern is usually a host. Airbnb now bans indoor security cameras entirely — not just in bedrooms and bathrooms, but everywhere inside a listing, “regardless of their location, purpose, or prior disclosure,” effective April 30, 2024 (Airbnb Newsroom). Outdoor cameras are still allowed, but hosts must disclose their presence and general location before you book, and they can’t be pointed at indoor spaces or placed somewhere like an enclosed outdoor shower or sauna (Airbnb Newsroom).
If you suspect a camera was placed by someone with ongoing access to your home, rather than a host you’ll never see again, read Safety first: before you remove anything before you start looking. Searching for it, then covering or disabling it, can be visible to whoever placed it.
A realistic inspection, not a gadget-first one
None of the reliable techniques here require special equipment. Start with your eyes.
- Look for anything that doesn’t belong. An extra smoke alarm near an existing one, a clock or toy that seems out of place, an object angled to face a bed or couch — cameras are often built into ordinary household items specifically because they’re easy to overlook (Safety Net Project).
- Check what’s plugged in and what’s wired. A wired camera can run a cable through a wall or ceiling to a recorder elsewhere in the building — something a wireless-only detector or Wi-Fi scan won’t find at all (Safety Net Project).
- Try the phone-camera infrared trick, understanding its limits. Darken the room as much as possible, then slowly sweep your phone’s camera around — each camera in turn, if your phone has more than one. Most cameras built for covert use have infrared illuminators for night vision, and an active infrared LED can show up on your screen as a small purplish glow (Safety Net Project). This only catches cameras with infrared on at that moment, and some phone camera sensors filter infrared light more aggressively than others, so a clean sweep doesn’t rule anything out.
- Check who’s on the Wi-Fi. Many hidden cameras stream over the network to be viewed remotely. Look at your router’s connected-device list (or a network scanner app) for anything you don’t recognize. This only catches cameras connected to that network, at that moment — a camera that only records to local storage, or one riding a separate cellular connection, won’t show up here at all (Safety Net Project).
The honest limits of detector gadgets and apps
RF (radio frequency) detectors and lens-glint finders are widely sold and marketed as reliable. The independent evidence doesn’t back that up.
Researchers writing in USENIX’s ;login: magazine tested one physical spy-device detector and eleven detector apps against real hidden cameras, microphones, and GPS trackers, the same categories used in intimate-partner surveillance. Their conclusion: “these detectors fail to live up to their claimed abilities,” with readings that were “practically indistinguishable whether or not there was a device present in the room.” Some detector apps that claimed to sense hidden electronics were just repurposing a phone’s magnetometer — a sensor that can’t detect radio signals at all. The researchers concluded the detectors “are technologically incapable of detecting any spy devices,” so that at best they waste money, and at worst give survivors a false sense of security (USENIX ;login: — “Sneaky Spy Devices and Defective Detectors”).
A clean scan isn’t proof a room is camera-free, and a beep or flashing light isn’t proof one is present. The same caution applies to any privacy check: see What a scan can and can’t tell you for why no scan — phone, network, or gadget — can certify a device or space is clean.
What Airbnb and hotels are (and aren’t) required to do
Airbnb’s rules give you something concrete to point to. If a host’s listing doesn’t mention outdoor cameras and you find one anyway, or you find any indoor camera regardless of disclosure, that’s a policy violation you can report through the platform, separate from whatever your state’s law says.
The law goes further than Airbnb’s own policy, but the main federal statute is narrower than people expect. It makes it a crime for someone, within the “special maritime and territorial jurisdiction of the United States,” to have “the intent to capture an image of a private area of an individual without their consent, and knowingly [do] so” somewhere the person has a reasonable expectation of privacy — such as a place they could expect to undress in private. “Private area” is defined narrowly: genitals, pubic area, buttocks, or female breast (18 U.S.C. § 1801, Video Voyeurism). Outside that specific federal jurisdiction and those body parts, hidden-camera cases fall to state voyeurism or invasion-of-privacy laws, which vary by state.
If you find one
Don’t touch, unplug, or cover it yet — read Safety first: before you remove anything and Documenting it and getting help before you act, especially if the camera might belong to someone you still live with or share access with. Moving a camera can destroy evidence of exactly how and where it was aimed, which matters if you report it.
If it’s safe to do so:
- Photograph it in place — the object itself, its exact location, and what it’s pointed at.
- Note the date and time you found it, and anything that made you start looking.
- Decide on physical safety first. In a rental, that can mean leaving the property before you do anything else.
- Report it. In an Airbnb, report the listing rather than confronting the host directly (Airbnb Help Center). In a home you share with someone, or if you believe a crime occurred, contact local law enforcement — this is what police and prosecutors handle, not something to resolve one-on-one with the person who placed it.
A camera you can’t find isn’t the same as a camera that isn’t there, and a detector’s silence isn’t a guarantee either. If something about the space still feels wrong after a careful look, trust that instinct and get help rather than trying to rule it out alone.