Kernrechtsfrage
Whether the owners had an actual and practical interest to challenge the building's assujettissement to the LDTR after obtaining relief on the renovation issue
Extrahierter Entscheid
They lacked a current, practical, legally protected interest to seek review of the assujettissement question.
Extrahierte Begründung
The impugned assujettissement only affected them eventually; they had already prevailed on the need for authorization for the studio works, and any future similar works could be litigated later if a transformation decision were issued.