Ok, so a big problem with this game, and a problem that this latest update did not fix, was the ability to troll a persons house. So here is my theory on a way to fix it. PLEASE try to find holes and flaws with it so I can keep thinking about this issue…
So here we go;
Foundations are the key here. Basically, when you put down a foundation, and place a door on top of that foundation, you become the ‘owner’ of the foundation. Only the owner is capable of building on that foundation, EXCEPT FOR DOORS, anyone can build a door on a empty doorway. If you have a multiple-story building, the person has to control every door that is built on that base foundation in order to become the ‘owner’ of it.
Now, another thing, you can ONLY build foundations next to another foundation if YOUR the owner of that foundation. This way, people can not build right next to your house, or build a staircase right next to your house in order to reach your roof.
Edit: Ok so, if theirs a foundation with no doors, the question is who owns it…imo make the person who placed it be the owner, however if a door gets put on, the ownership changes to that person.