Can a New York tenant challenge a rent increase in court?

Yes, in two scenarios. First, if the increase exceeds a statutory rent cap that applies to the unit (where New York or local law limits annual increases), the tenant can challenge the excess amount in court or through the local rent board. The remedy is usually rent abatement and refund of overpayment. Second, if the increase notice itself was procedurally defective (insufficient notice period, improper service, missing required disclosures), the tenant can challenge the increase as void and continue paying the old rent until proper notice is served. Both challenges typically require the tenant to first dispute the increase in writing to the landlord. New York uses a tenure-based notice ladder at RPL 226-c: 30 days for tenancies under 1 year, 60 days for 1-2 years, 90 days for 2+ years. Only triggers if the increase exceeds 5% or the landlord does not renew. Good Cause Eviction (Part HH 2024) caps increases at CPI + 5% or 10% max in NYC and opt-in municipalities, with exemptions for small owner-occupied buildings and new construction. Tenants should consult with a local fair-housing or tenant-rights organization before withholding rent based on a perceived improper increase, as nonpayment can become its own ground for eviction.

Source: RPL 226-c (HSTPA 2019)