Single-family house with a ground-level granny flat on a slope

How can there be a mistake with the username?

"Homeowner" was somehow not compliant with the rules.

Regarding the south terrace: right now it looks like we would move the basement/garage 3m forward and thus have about a 20x3 - 3.5m terrace. I am absolutely dissatisfied with that because the dimensions are so odd.

We would be fine with about 5x6m, 6x7m in the middle, so just under 40m2. But then we have the problem that the parents would no longer be able to reach the west garden unless they walk all the way around the entire building complex.

A terrace with a steel structure has the problem, besides its price, that the supports would either have to be 20 m wide or stand directly in front of the garages. Can you think of the most clever way to solve this?

Next point: a sales consultant told me today that we can only build 1.5 stories because the eaves height dictates it. He calculates 3m for the garage, 2.5 for the ground floor, and attic with 1.8m knee wall height. But in the development plan it says that the reference height is taken from the modeled terrain and in the sketch it is also shown that the garage is not included. What is correct? (See sketch).

And since there apparently is also a height reference for the attic: what is the intersection point of the existing terrain or how do I calculate it? Googled and didn't understand.

If I plan this, the heights are easily manageable. Reference is [best. Gelaende].

Thank you. If the existing site is the reference, I don’t understand what the problem is.

Sure, I have to excavate to put the garage in, but on the sketch the garage doesn’t count either. Or am I thinking in the wrong direction?

What does "wenn du das planst?" mean? Do you do this professionally? Please say yes

Unfortunately not. I am not an architect. My template authorization has surely expired and is only valid in the district. If you have the first drafts, I would be happy to take a look at them. I have already spent some time with your property and house.

Is having the residential units for parents and daughter on the same level really a must-have? You somehow have to build more compactly. Basement / cellar for parents, ground floor for you, attic for kids? Better is parents and kids in the basement and you on the ground floor. The daughter then always manages the one staircase down. The parents don't need to climb any stairs.