Kernrechtsfrage
Whether the administrative appeal was admissible before the Federal Supreme Court
Extrahierter Entscheid
It was not admissible because the dispute concerned cantonal building law and no independent federal-law complaint was available.
Extrahierte Begründung
The case turned on whether the staircase had to respect setback distances, a question of cantonal law; the cited federal planning provision was not decisive on admissibility.