In Katja's defense (and all skeptics here in the thread including myself!)
The doubts about the buildability were based on:
1. a localization of the corpus delicti on the property only through hand sketches, Google Maps screenshots, and self-made, guessed site plans
2. incomprehensible statements from the authorities regarding required additional distances
3. the unthinkability of the authority reducing the minimum distances for better buildability
4. permission for boundary construction at the sidewalk
All points have accordingly expanded the "building window" to a usable size.
Therefore, this bet was of course nonsense, I could have also described our building plot as unbuildable (wrong sketches, etc.) and now show you pictures of the finished house: nyah-nyah.