Nobody “owns” land. Even under capitalism. If you think you do, stop paying the rent tax you pay the government in order to “own” that land and see what happens.

Point is, even if you “own” a house, if the government decides they want to confiscate it, they have a whole army to do it. All ownership is always at the mercy of the government. (More accurately, ownership is at the mercy of whoever has the monopoly on violence, since they can only take ownership through it.)