Kniestock in the case of calculated two-story construction

Hello!

As far as I know, there is a rule by which one can determine whether a house is considered single- or two-story based on the ratio of the attic area with a certain room height to the ground floor area. Where is the knee wall located in the case of calculated two-story status? In the attic or above that in the attic space/loft?

Underlying this is the question of whether I can practically plan my knee wall freely in the attic if the house is considered two-story.

The knee wall can be on the upper floor if you have exceeded the upper floor/ground floor ratio. In typical townhouses, it is at the height of the upper floor ceiling. However, it could presumably also be in the attic. It should not be freely planned either, as otherwise you might end up with 3 stories. But that is usually done as a 2.5-story building, with living space under the roof. In addition, the development plans include specifications for maximum eaves heights/ridge heights.

The knee wall depends on the roof shape. If you build a gable roof, there are different angles of the roof. From flat to steep, everything is technically possible here. Legally, the development plan must allow it, or if not available, the approval authority must permit it. With a flat roof or single-pitch roof, you then don’t have a knee wall anymore?!