Questione giuridica chiave
Whether the nuisance from prostitution-related activity justified a 40% rent reduction instead of 15%
Decisione estratta
A 15% rent reduction was appropriate; the cantonal court did not abuse its discretion.
Motivazione estratta
The defect was of medium seriousness, affected only part of the premises, and the court could weigh the reputational harm and loss of clientele against the fact that the habitable attic space was unaffected and the situation was less extreme than the cited Zurich case.