Facing a non-renewal of lease notice can be stressful and confusing, especially in New York City where housing laws are complex. If you're wondering how to fight non renewal of lease, it's crucial to understand your rights as a tenant and the legal options available to you. Landlords in NYC generally have the right not to renew a lease once it ends, but they must follow specific rules. For rent-stabilized tenants, a landlord must have a legally valid reason to deny renewal, such as nonpayment of rent, violation of lease terms, or using the apartment as a non-primary residence. In market-rate units, landlords can choose not to renew without providing a reason but retaliation or discrimination is never allowed.