Key legal question
Whether the landlord proved local/usual rents for comparable parking spaces under Art. 269a let. a CO and Art. 11 OBLF
Extracted holding
No. The landlord relied on too few and too general comparators; for parking spaces some criteria must be relativized, but concrete defined comparison objects are still required.
Extracted reasoning
At least five comparable objects are generally needed. Here only four usable comparators remained, and the data provided was too general to establish usual rent.