💖🥪🥪🍹 The House when designing it....technically, you all just need to see One kitchen, one Living room, I sleeping in one room, One garage for junks, One walking closet.

And the bathroom. If you have 3 generation family, that is grand pa, grand mom, your both parents, with you + sibling + your own kids. Some people have that kinds of the family, from the basement up to the second floors. Its how big the lot, that is the property tax. I don't need the grass lawn. 

My parents go and afford their room + we 3 sibling rooms. That is how can be designed. Like near by. In California, there are a lot of those houses I have seen, there is one additional suite. Like there is a room +  a bathroom, a simple layout of a guest room staying places. I can design a small kitchen, or tea coffee places. 

My property tax would be higher than yours, correct. You are semi-deattach those straight up, very steep built apartment, with the a basement garage to the first floor to the second floor. That is the square yards of all within, so that is the property tax in that dimension.