If i were to go through the games code, and be able to find a way to make new offices, would that be illegal. This a question for @PatrickKlug really
as long as you don’t infringe on anyone’s copyright (means you have your own artwork) and you don’t distribute any of the game files then that would be fine. I’m sure that sooner or later someone will make mods that change the office designs 
6 Likes