Don't I have the "right to privacy" in a private home I shared with a roommate? Former roommate is using photos taken in the house and back yard of my pets (and using their names) for commercial ads? Shouldn't I be given a "property release" releasing my permission for images/photos of my property (pets and their names) used for commercial ads?
Several different kinds of property ownership exist, including joint tenancy, tenancy in common and more. The right one for you depends on your circumstances.