Do you also mean that I don’t have to apply the 2/3 rule in the 1st upper floor/attic, basically that I don’t have to worry about it
Yes, the "II" despite the description of the "one-and-a-half-storey building" by "1+D" (or in hillside locations on the other side of the street usually "U+1") exactly refers to this carefree attitude regarding the full-storey issue.
basically I don’t have to worry if I create more space with dormers or similar?
Roof structures will have to remain subordinate. And perhaps even dormers (set back) will be expected instead of cross-gabled dormers (not set back, colloquially lumped together).
Would you maybe have any idea how I can bypass this knee wall requirement or somehow manage to get two full storeys without any roof pitch?
Clearly no – not due to a lack of imagination, but because of my experience with development plans, which precisely do not want to be tricked.
I would only reluctantly quote the development plan here because I will soon live in a very small village and quoting it would clearly reveal where.
You won’t move there anyway if a straight-wall cross-section of the attic is indispensable for you. Do you seriously fear not being served at the bakery because it has gotten around that Norakay fancies herself above others and won’t stoop to a sloping roof (and I suppose rightly so, and you secretly agree with the shop assistant)?
Passau is not that much worse than Fürth (but maybe Memmingen is). Sometimes I am so glad I’m a Prussian – except when there are meatloaf sandwiches :)
At least you would probably gain – if you gave them the chance to identify your Hintertupfing by entering the development plan text into Vroniplag – a crushing amount of clarity from and a building proposal from . Try your luck (but probably not by introducing a New York skyline in Küblach or Kaltenthal).