Lessor v. Tenant: Breach of Lease for Unauthorized Commercial Use

A lessor sued a tenant for eviction and rent arrears after the tenant, whose lease required residential use, began operating a professional activity from the premises without the landlord's consent. The court upheld the lower court's decision granting the eviction and ordering payment of the arrears, reasoning that the unilateral change in the use of the leased property, constituting a breach of a fundamental contractual obligation, justified the termination of the lease and the claim for unpaid rent, irrespective of the extent to which the professional activity actually disrupted the property.