Show your property pictures!

...this looks highly interesting.

It is good to look at many houses and ideas and to note what you like and what you don't. The house shown has a clearly recognizable concept regarding access and a play between closedness and openness. In the end, it is the conceptual ideas and their implementation that make good architecture. What could your concept be?

Somehow I am leading you on the wrong track or I have a wrong thought.

Is the following assumption wrong?

From the soil survey and slope profile, concepts/layouts arise that are more or less suitable because, for example, one has to interfere too much with the slope or because the soil is not load-bearing enough.

And now I have the feeling that an architect is only conditionally the right contact person.
He will make it suitable. All a question of budget.

But maybe I just haven't found the right one yet.

Could a cellar builder / contractor be the better advisor at the beginning?

Of course, you can make everything fit with money. But beyond a certain amount, it no longer suits me or the location.

what should a basement builder be able to do? He cannot plan a house

Anyone whose taste and/or budget requires a ground slab house must bite the bullet and keep looking until they find a [Bodenplattengrundstück]. Beautifying a hillside plot with L-stones costs a fortune – and consoling oneself with pictures of architectural gems for hillside plots does not solve the problem.

Whoever's taste and/or budget requires a slab-on-ground house must bite the bullet and continue searching until they find a slab-on-ground plot. Trying to beautify a hillside plot with L-walls costs a fortune – and consoling oneself with pictures of architectural gems for hillside plots does not solve the problem.

... if it helps your ego. Here you go.

what is a basement builder supposed to be able to do? He can't plan a house

You would go to an architect with the square meter area and “room layout”?