Do the others know the cameras are there? Presuming the answer is no, then this is likely an invasion of privacy, and possibly far worse for you if you are obtaining pictures of children in undress.
This response is only general information and is not legal advice. It does not form an attorney-client relationship and should not be relied upon to take or refrain from taking any action. You should seek a qualified attorney before taking any action related to your inquiry.
Placing cameras in a vacant house or an occupied house is not illegal. TAKING PHOTOGRAPHS inside the house of people IS illegal. If you did this, you should stop it immediately. If it happened to you, you should hang up and dial 911
This question doesn't have enough information to give you a definitive answer, but the other attorneys who have answered so far have expressed the same concerns that I have. If everyone is an adult and everyone knows and consents to the cameras actually photographing/recording the events in the house, then it's not illegal. Change any of those underlying facts and you will get a different answer.
Years licensed, work experience, educationLegal community recognition
Peer endorsements, associations, awardsLegal thought leadership
Publications, speaking engagementsDiscipline