Sloped plot, single-family house 50m², slope, garage optimization

We want to designate the upper floor as a second residential unit for the KfW. Therefore, the staircase landing in that position is already obsolete. In my opinion, only a quarter-turn staircase at the entrance works so that we can build a wall for a windbreak. The general contractor still has to adjust this.

But then it’s completely different upstairs again, and whether that will be liked?!

How is the upper floor supposed to be a second apartment with that staircase placement? You can’t separate the lower one, can you?

Yes, you can if it’s rotated. But: you can already see from the lower hallway that it’s not really great. The rooms are lined up one after the other. The cloakroom is awkwardly located right in front of the living room entrance. It absolutely does not belong zoned there. already said it: pantry and cloakroom should be swapped here if anything. Everything seems to be subordinated to the granny flat, even though a single-family house is intended. What am I reading? KfW40? Full basement? What is in the basement besides technology and laundry? The guest room is later not well furnishable as a bedroom with two window sides. Judging by the upper floor, there’s nothing to say…

If the basement already sticks out 1.80 meters from the slope, why not put the living space in there...?

Yes. You can rotate it.

And how?

If the basement already protrudes 1.80 from the slope,

It doesn't protrude that far because of the height difference, but the one meter height difference and 80 cm plinth make up the 1.80 (why actually?).

The initial post stated a height difference of 1.80, and that is how I also interpreted the sketch.

and that is how I also interpreted the sketch.

The sketch defines the street-side boundary as 0, then it is one eighty to the "end" of the house, but only 80 cm to the "beginning," so one meter within the house depth.

Small plot of land and house with garage for 2 cars on a hillside. Now I haven't fully understood the direction of the slope yet - my goal would be, if possible, to park the vehicles in the basement instead of in a garage. EDIT: Info overlapped. You would have to get to the side under the terrace - but that would also be a high land use.