Kernrechtsfrage
Whether the apartment sale was a pure real-estate sale or a mixed sale/work contract with construction duties.
Extrahierter Entscheid
The contract was a mixed land sale with construction performance obligations because the buyer influenced the interior design and the unit was adapted to her wishes.
Extrahierte Begründung
Where the buyer can influence the work process, even partially, the transaction is treated as a mixed contract; defects of the building are then governed by work-contract law.