I know some things are annoying pedantic about where their construction sign is placed, obviously I understand why somethings need flat terrain, and even why pavement is required. But what would be really really helpful is if the devs could make it so that the ghost will go green when placing a building, and putting objects down.
So with sheds what are the requirements? I have a 3x3 flat area but it won't let me place it there, but it did let me place it on another 3x3 flat area. (neither were paved)