Kernrechtsfrage
Whether the use of residential studios as massage parlors/prostitution requires planning authorization and justifies a restoration order.
Extrahierter Entscheid
Yes. The regular professional use of the studios for prostitution was incompatible with residential use and required authorization under planning law.
Extrahierte Begründung
The activity was a profit-oriented professional activity distinct from mere habitation; it could affect the surrounding neighborhood and thus fell outside the notion of dwelling, even if the hostesses lived on site.