According to the floor area ratio, only 138 m² is possible - 2 floors - Help :)

Lounge is defined in the state building code and cases of doubt (hobby room, sauna, ...) are more or less clarified by countless rulings.

Bedroom, living room, children's room, kitchen, ..., access corridors and stairs - according to external dimensions!
Storage rooms, side rooms, bathrooms, toilets, dressing rooms, ... are not included

Then the dressing room and bathroom fit

Is there a list for that?

also take action against the building authority

That is the gateway for future granite-ization of the area

It fits that we planned with about 140m2 and could come up to this sum through the areas (that are not counted) ...

Bathrooms and dressing rooms are not living spaces