Kernrechtsfrage
Whether the lease was partially invalid due to essential mistake about the rental surface under Art. 24(1)(4) CO
Extrahierter Entscheid
Yes. The stated area was objectively and subjectively essential for fixing the rent, and the 17% discrepancy was far beyond a tolerable approximation.
Extrahierte Begründung
In commercial leases, surface is a key factor for rent. The tenant could rely on the contractual indication and was not required to measure himself. The approximation clause covered only minor deviations, not a difference of 41.8 m2. The tenant timely declared invalidation and did not ratify the contract.