Kernrechtsfrage
Whether awarding procedural costs to the architecture bureau was arbitrary under Article 9 of the Federal Constitution
Extrahierter Entscheid
The costs award was not arbitrary in its result, even if the cantonal court should preferably have awarded costs to the owners under cantonal procedure.
Extrahierte Begründung
The bureau had been treated as the representative in the earlier proceedings and was invited to respond in the revision; the appellants did not show that the bureau acted against the owners' interests, and the financial effect was the same regardless of the named creditor.