Key legal question
Whether an exception permit under § 138(1) BauG could justify exceeding the core-zone floor-space ratio
Extracted holding
No; the situation was not extraordinary and did not create an unreasonable hardship.
Extracted reasoning
The need for additional rooms was comparable to ordinary space needs of many owners; the proposed attic conversion was simply the easiest and cheapest solution, not a location-specific necessity. Refusing it was a normal consequence of the valid floor-space limit.