By the LeaseHelper editorial team
New York's warranty of habitability under N.Y. Real Property Law § 235-b is automatic, non-waivable, and covers every residential lease in the state — written or oral — and a single ignored repair complaint can trigger rent abatement, an HPD Class C violation, and a retaliation claim all at once.
This post walks through the five most consequential mistakes small landlords make around New York's habitability rules: misreading what the warranty actually covers, ignoring the notice-and-knowledge requirement, bungling the heat-season obligations, missing the DHCR complaint window for rent-regulated tenants, and accidentally triggering the anti-retaliation statute under N.Y. Real Property Law § 223-b.
Mistake #1: Thinking the Warranty Only Applies to the Apartment Itself
Under N.Y. Real Property Law § 235-b, in every written or oral lease or rental agreement for residential premises, the landlord is deemed to covenant and warrant that the premises so leased or rented and all areas used in connection therewith in common with other tenants or residents are fit for human habitation. The "in common" language is not boilerplate. It means your hallways, stairwells, basements, and building entrances are all on the hook.
The warranty of habitability includes public areas of a building in addition to individual apartments. So a broken entrance door lock, a pest-infested basement hallway, or inadequate lighting in stairwells are all potential § 235-b violations — not just a burned-out bulb in unit 3B.
Landlords of multiple dwellings must keep apartments and public areas in good repair, clean and free of insects, pests, garbage, or other offensive material. Landlords must also make sure all electrical, plumbing, sanitary, heating, and ventilating systems are working, and that any appliances they install — like refrigerators and stoves — are in good and safe working order. If your lease lists an appliance as part of the unit, that appliance falls under the warranty, even if it was there when you bought the building.
One subtlety that trips up small landlords: any agreement by a lessee or tenant of a dwelling waiving or modifying his rights as set forth in § 235-b shall be void as contrary to public policy. You cannot write your way around this in a lease — no "as-is" clause, no "tenant responsible for all maintenance" provision will hold up in court.
Mistake #2: Not Documenting That You Received Notice
For a tenant to receive a rent reduction, the landlord must have actual or constructive notice of the existence of the defective condition. This is one of the most landlord-friendly elements of New York habitability law — and the one landlords most often fail to use in their defense. If you never received notice of the problem, a court cannot award a rent abatement for the full period.
The flip side is that "constructive notice" counts. If a condition is obvious and longstanding — say, a stairwell light has been out for six months — a court can find you knew or should have known without a formal written complaint from the tenant. Before a tenant can take any action, they will need to provide notice beforehand, and it's essential to make sure there is proof of delivery of that notice. Landlords should keep the same proof going the other direction: date-stamp every repair request you receive and log every response you make.
Landlords are required to maintain electrical, plumbing, sanitary, heating, and ventilating systems, and appliances installed by the landlord, in good and safe working order. All repairs must be made within a reasonable time that may vary depending upon the severity of the repairs. Document what you did and when. If a tenant later claims a months-long habitability problem, your repair logs are your primary defense.
Mistake #3: Misunderstanding NYC's Heat-Season Numbers
Heat is the single largest source of HPD complaints and habitability litigation in New York. Building owners are legally required to provide heat and hot water to their tenants. Hot water must be provided 365 days per year at a constant minimum temperature of 120 degrees Fahrenheit.
For heat specifically, the rules under NYC Admin. Code § 27-2029 are precise and enforced on a per-inspection basis:
| Period | Hours | Outdoor Trigger | Required Indoor Temp |
|---|---|---|---|
| Heat Season (Oct 1 – May 31) | 6 a.m. – 10 p.m. | Outside temp below 55°F | At least 68°F |
| Heat Season (Oct 1 – May 31) | 10 p.m. – 6 a.m. | Any outdoor temp | At least 62°F |
| Year-round | All hours | N/A | Hot water ≥ 120°F at source |
A heat violation is a Class C — immediately hazardous — violation under the NYC Housing Maintenance Code. The penalty for failure to provide adequate heat is a "Class C" immediately hazardous violation that must be corrected within 24 hours. Landlords are not permitted to transfer the responsibility of heating to the tenant, even with lease agreements that say otherwise. Heating obligations under the Housing Maintenance Code override lease provisions.
Repeat violations cost more. HPD may impose an Inspection Fee of $200 if a third or subsequent inspection within a heat season results in a third or subsequent heat violation, and if a third or subsequent inspection within a calendar year results in a third or subsequent hot water violation. That fee stacks on top of civil penalties. And if HPD's Emergency Repair Program steps in to fix the heat, HPD's Emergency Repair Program may contract with private companies to restore essential services and bill the owner for the cost of the repairs, plus related fees — and the city is subject to laws governing procurement, contracting, and wages that may make such work significantly more expensive than the price owners could obtain themselves.
Mistake #4: Missing the DHCR Complaint Window for Rent-Regulated Tenants
If any of your units are rent-stabilized or rent-controlled, habitability complaints can take two tracks simultaneously: Housing Court and the Division of Housing and Community Renewal (DHCR). Many small landlords don't realize DHCR has its own strict filing window.
Rent-regulated tenants can file a rent reduction complaint with DHCR. Before filing such a complaint with DHCR for breach of the warranty, the tenant must communicate in writing with the landlord about the problem. A complaint may only be filed with DHCR not less than 10 days and not more than 60 days from the date the tenant sent a notice to the landlord. Miss that 60-day ceiling and the DHCR complaint is procedurally barred — but the tenant can still bring a Housing Court action, so this doesn't get you off the hook entirely.
Rent-stabilized and rent-controlled tenants may apply to DHCR to have an order issued reducing their rent obligation to $1 to maintain a possessory interest in the apartment until it becomes habitable again. A $1 rent order on one of your stabilized units means you're collecting almost nothing while still carrying the mortgage, taxes, and utilities on that property. Treating the 10-to-60-day window as an administrative technicality is a serious mistake.
The court or DHCR may grant a rent reduction if it finds that the landlord violated the warranty of habitability. The reduction is computed by subtracting from the actual rent the estimated value of the apartment without essential services. In practice, courts look at the percentage of the apartment rendered non-functional and apply that proportion to the monthly rent. A unit with no heat for six weeks of a New York winter can generate a meaningful abatement.
Mistake #5: Triggering the Anti-Retaliation Presumption Under § 223-b
This is where landlords do the most inadvertent damage. A tenant files a 311 complaint or sends a certified letter about a broken radiator. You're legitimately frustrated. Two months later you serve a non-renewal notice or a rent increase. That sequence creates a legal problem regardless of your actual intent.
In an action or proceeding instituted against a tenant, a rebuttable presumption that the landlord is acting in retaliation shall be created if the tenant establishes that the landlord served a notice to quit, or instituted an action or proceeding to recover possession, or attempted to substantially alter the terms of the tenancy, within one year after a good faith complaint. The effect of the presumption shall be to require the landlord to establish a non-retaliatory motive for his acts by a preponderance of the evidence.
The one-year lookback window is what catches landlords off guard. It is illegal for landlords in New York to retaliate against tenants for participating in tenant organizations. It is also illegal for landlords in New York to retaliate against tenants who make a good faith complaint to them or to a government agency about violations of health and safety laws, issues with habitability or non-repair of the premises, violations of rights under a lease, or rent gouging.
There is also a financial sting for lease-clause overreach. Any lease provision which seeks to assess a fee, penalty, or dollar charge, in addition to the stated rent, against a tenant because such tenant files a bona fide complaint with the landlord, the landlord's agent, or a building code officer regarding the condition of such tenant's leased premises shall be null and void as being against public policy. A landlord or agent of the landlord who seeks to enforce such a fee, penalty or charge shall be liable to the tenant for triple the amount of such fee, penalty or charge. If you have a lease clause that charges tenants for "excessive maintenance calls," strip it out.
Tenants may collect damages from landlords who violate this law, which applies to all rentals except owner-occupied dwellings with fewer than four units (Real Property Law § 223-b). If you live in your two-family and occupy one unit, you may fall outside § 223-b's scope — but you are still bound by § 235-b's habitability warranty regardless.
A Decision Framework: When Does a Condition Breach the Warranty?
Not every imperfection is a § 235-b violation. The statute requires conditions that are "dangerous, hazardous or detrimental to life, health or safety." Here's a quick triage framework to apply before deciding how urgently to act:
The framework mirrors the statutory carve-out in § 235-b: when any such condition has been caused by the misconduct of the tenant or lessee or persons under his direction or control, it shall not constitute a breach of such covenants and warranties. Keep that in writing — if you believe tenant damage caused the condition, say so in your response and document your evidence.
What Tenants Can Actually Do to You — and What You Can Do About It
Understanding the tenant's toolkit helps you triage which situations to resolve immediately and which to contest. If a landlord breaches the warranty of habitability, the tenant may sue for a rent reduction. In a non-payment proceeding that you bring, the tenant can raise the warranty as a counterclaim or affirmative defense and ask the court to offset what they owe.
On the repair-and-deduct question: New York doesn't have a clean statutory repair-and-deduct right the way some states do. New York lacks specific legislation that ensures this right. New York law guarantees renters a basic standard of livable conditions — rental properties must be safe, livable, and meet legal standards. Courts have sometimes permitted it in narrow circumstances, but in extenuating circumstances, tenants may make necessary repairs and deduct reasonable repair costs from the rent — the key phrase being "extenuating circumstances." It's not automatic and is always litigation-risky for both sides.
The most drastic tenant remedy is lease termination. If an apartment becomes damaged and uninhabitable by fire, water damage, or other problems not caused by the tenant, the tenant may be able to leave the apartment and cancel the lease on three days' notice to the landlord. In this case, the tenant will have no further obligation to pay rent to the landlord. Under N.Y. Real Prop. Law § 227, the landlord must also refund rent paid in advance and any security deposit held. This is a true emergency scenario — a flooded, burned, or structurally condemned unit — not a broken appliance.
About LeaseHelper: We build state-compliant lease, eviction, and rental document generators for small landlords and property managers. We publish guides on landlord-tenant law, security deposits, and evictions, updated as state regulations change.
Generate a state-compliant lease in 5 minutes
We build state-compliant lease, eviction, and rental document generators for small landlords and property managers. We publish guides on landlord-tenant law, security deposits, and evictions, updated as state regulations change.
Get started →Frequently asked questions
Does New York's warranty of habitability apply to my two-family owner-occupied property?
Yes — N.Y. Real Property Law § 235-b applies to every residential lease in New York, written or oral, regardless of building size or whether you live on-site. What changes for owner-occupied buildings with fewer than four units is the anti-retaliation statute: § 223-b explicitly exempts owner-occupied dwellings with fewer than four units from its coverage. But the underlying duty to maintain a habitable unit under § 235-b remains. You still can't ignore a pest infestation or a broken heating system just because you occupy the other unit.
My tenant stopped paying rent and claims a habitability breach. Can I evict them for nonpayment?
You can file a nonpayment proceeding, but the tenant can raise the warranty of habitability as an affirmative defense and ask the court for a rent abatement. The court calculates abatement by subtracting the estimated value of the apartment without essential services from the actual rent — so your recovery may be reduced even if you win. The safest path is to fix the condition, document the repair with dated receipts, and present that record to the court. If you delay repairs and the condition was one you knew about, expect the abatement to cover the full period of non-repair.
What are my heat obligations outside of New York City?
NYC's specific temperature thresholds (68°F daytime, 62°F nighttime, October 1 – May 31) come from NYC Admin. Code § 27-2029, which applies to NYC multiple dwellings. Outside of New York City, landlords across the state are still bound by N.Y. Real Property Law § 235-b's general habitability warranty, which requires that conditions not be "dangerous, hazardous or detrimental to life, health or safety." For upstate properties, the Multiple Dwelling Law (§§ 78–80) governs cities with populations of 325,000 or more, and the Multiple Residence Law (§ 174) covers towns and villages. Failing to provide heat adequate for human habitation in winter will constitute a § 235-b breach anywhere in the state.
A tenant filed a 311 complaint, and I want to raise the rent at renewal. Am I legally at risk?
Potentially yes, if the rent increase occurs within one year of the tenant's complaint. Under N.Y. Real Property Law § 223-b, a rebuttable presumption of retaliation arises if you substantially alter the terms of the tenancy — including an unreasonable rent increase — within one year of a good-faith habitability complaint. To overcome the presumption, you must prove a non-retaliatory motive by a preponderance of the evidence. Document the business rationale for any rent increase independently of the complaint: market comparables, increased operating costs, scheduled annual adjustments. The stronger your paper trail showing the increase was planned before the complaint, the better your position.