Key legal question
Whether the neighbors had standing to invoke arbitrary application of cantonal rules on party capacity and building aesthetics/plan protection
Extracted holding
No standing existed for these merits complaints because the invoked norms protected public interests, not the neighbors' legally protected interests.
Extracted reasoning
Under Art. 88 OJ, a neighbor may rely on provisions protecting neighboring interests, but norms on party capacity, aesthetics, protected zones, and planning principles primarily serve public interests; pure aesthetic clauses do not confer standing.