Kernrechtsfrage
Whether replacing plastic greenhouses with metal structures qualifies as a renovation rather than an extension or partial transformation.
Extrahierter Entscheid
The replacement cannot be treated as a mere renovation; it is a renovation linked to an enlargement or a partial transformation because the work does not preserve the object's essential extent and external appearance.
Extrahierte Begründung
A transformation must preserve the work's identity in its essential features, including its extent and outward appearance. That condition was not met here.