If you're wondering how to fight non renewal of lease, start by reviewing your lease agreement and the notice itself. In New York, landlords must follow strict procedures, and any misstep could make the non-renewal invalid. For example, if you’ve lived in a rent-stabilized apartment, you may have special protections that prevent arbitrary non-renewals. Tenants have rights, and fighting a non-renewal starts with knowing them. Was the notice sent in time? Does it cite a legitimate reason? Have there been any signs of retaliation or discrimination? If so, legal action may be possible.