I'm designing a fair housing website for a local non-profit. We don't have much money or resources. I drove around and took a few pictures of plain, ordinary, not-special looking buildings. I can't seem to be able to figure out whether I need to get permission from the property owners to be able to post these pictures to this non-commercial website. Does anybody have any idea? Side note: I am an attorney, but I know as much about IP law as I know about biochemistry (nothing at all). Any help is appreciated.