Generally, it’s legal to use a hidden camera in your own home but laws vary from state to state so it’s a good idea to check your state laws. Often, the camera itself is fine but you’re not legally allowed to record certain things. Avoid placing cameras in bathrooms or bedrooms to avoid violating anyone’s privacy. You should also consider carefully whether or not you want to record your family members. While watching your infant or toddler is a genuine safety issue, your school-aged children might not take too kindly to having their privacy violated.