Such a development plan with a plot is definitely not a wish concert. ;)
It is definitely wiser to use the roof than to build a basement. How, how much, and why, he has to clarify with the bank. But there is enough potential.
Understood, thanks for the many great suggestions and tips.
So when I was at the solid construction provider and we went through everything, she said that a roof would be difficult. If then only a small area where you can almost not stand upright, because the permitted height would otherwise be exceeded.
Not even a normal staircase could be made there, but one that can be pulled down.
It would be best, with 2 full stories, that I don’t see any roof pitch in the room. I find something like that confining.