Question juridique clé
Whether the determination of the main residential side under Art. 29 BZO was arbitrary.
Solution extraite
The cantonal court could reasonably treat the southeast as the main residential side, focusing primarily on the interior rooms and the largest living area.
Motifs extraits
The municipal explanatory notes were not binding. In particular for attic flats, interior orientation may outweigh exterior seating areas. The court's assessment was within its discretion and not manifestly untenable.