I have the feeling we've been groping in the fog here for 4 pages now. How about you specify the exact dimensions of your property? Along with that, the dimensions of the [Baufenster]. That would be helpful.
I am not sure. Scale is relative for you. Either your data is incorrect or the plan is wrong.
Is O/W 31m and N/S 24.6m?
O/W is about 35.5m and N/S 28.5m. Unfortunately, I don’t have an exact plan yet and have worked here with Floorplaner. Maybe I will put it up for discussion when I receive a plan with dimensions from the engineering office. In the picture, the yellow line is 10m.