Selecting property overwhelms us

Yes. If we understood correctly, you are not allowed to build a 3-story house, or we can't think of any rooms that could be there, because all rooms are actually living and common rooms, right? And the issue with the windows on the east would not affect 'our' properties. Or have we misunderstood something important?

We can't think of any rooms that could be there, because actually all rooms are living and common rooms, right?

Have you ever thought about storage or utility rooms? The technology would also be different from residential use. And apart from that, this is initially about the planned use of a room.