Questione giuridica chiave
Whether the challenged WEG rent increase, although within the rent plan, was abusive and therefore invalid.
Decisione estratta
Yes. Even if the maximum rent under the rent plan is respected, the rent increase may still be abusive where it serves a purpose unrelated to the protected interest, here to punish the tenant.
Motivazione estratta
The WEG rent-plan regime is not exhaustive as to all abuse situations. The general prohibition of abuse of rights also applies in public law. On the facts found, the landlord raised only the tenant's rent in a 70-unit building and did so as a retaliatory sanction after earlier disputes, which is arbitrary and uses the rent-adaptation mechanism for a purpose it does not protect.