Kernrechtsfrage
Whether the landlord's signed building application limited the tenants' compensation for added value to CHF 10,000
Extrahierter Entscheid
No. The signed form only expressed consent to the pool construction; it did not objectively cap compensation or set a price limit.
Extrahierte Begründung
Applying the trust principle, the form was an administrative request stating an approximate construction cost, not a contractual cap. The tenants could in good faith understand the landlord to consent to the pool despite the low estimated cost.