Why would you need a house with unconnected floors? But if you do need it, you can generate its floors as separate one-storey buildings with the same ground plan using the Blueprint editor.
if there is an elevator, there is no need for stairs! while i realize most irl building codes require both, i figure my ttrpg campaigns can have unbreakable magic elevators. thanks for the reply, i'll figure out how to adapt the floor plans for my needs 👍
