Kernrechtsfrage
Whether the tenants had a declaratory right to install a satellite dish on the leased garden seat.
Extrahierter Entscheid
No declaratory right was shown; the complaint failed on the merits.
Extrahierte Begründung
The mounted concrete base and dish constituted an alteration of the leased premises under Art. 260a(1) CO, requiring the landlord’s written consent, which was not proven.