What is the legality of surveillance in your own home?

If you have a surveillance camera that has a microphone hooked up in your own home for not only surveillance but as a webcam (meaning it can be accessed through the internet if you have all the pwords etc.). Is there anything illegal about that since it is recording non-stop? We have it in our basement/den because we usually keep our garages open in the summer and a flimsy door won't stop someone from breaking in but it also records everything else that occurs in our basement/ den area including the going abouts of the family and any guests who come over. Is there anything illegal about that? I am pretty sure there is not since it is our own home but this is to settle a bet with a friend. Thanks!