Your landlord pays. In a building with three or more apartments, section 27-2017.1 of the Housing Maintenance Code puts both the remediation and the leak behind it on the owner, and any lease clause moving that duty to you is void. The exception is narrow. You carry a violation only where you caused it by a wilful act or by gross negligence, and the owner still has to do the work.
The rent is the harder question. It stays due while the job drags on unless a judge or the state rent agency reduces it, and recovering what you spent means raising it in the right forum.
The Owner's Side of the Bill
Section 27-2017.1 sets a flat duty rather than a duty to try. The owner "shall keep the premises free from pests and other indoor allergen hazards", shall prevent the reasonably foreseeable occurrence of such conditions, and "shall expeditiously remediate such conditions and any underlying defect". An owner whose super wiped the wall twice has not met that duty.
The code defines an underlying defect to include a water leak, water infiltration from plumbing or defective masonry pointing, and other moisture conditions, which is what stops the duty at surface cleaning. The published work practices repeat it: correcting a mold violation means correcting the defect causing it. HPD's report to the City Council names poor roofing, pointing and indoor plumbing defects as the main contributors, and points owners to city loan and tax reduction programs that finance those repairs. Describe the water as well as the growth in the first notice you send.
Tenant Fault and What an Owner Must Prove
Section 27-2006 is the route the code provides for putting a repair cost on a tenant. You are responsible for a violation to the extent you had the power to prevent it, which the section limits to a violation caused by "his or her own wilful act" or resulting from "such tenant's gross negligence, neglect or abuse", including that of a household member or a guest. Ordinary carelessness does not reach that bar, and an owner arguing fault needs dated records, not a paragraph in a letter.
Section 27-2012 requires you to keep the apartment clean and sanitary, and that is the hook an owner reaches for. It does not carry the remediation cost. Section 27-2006 adds that a tenant's liability "does not relieve the owner of his or her obligation to keep the premises, and every part thereof, in good repair", and The Legal Aid Society gives the practical version: the repair is the landlord's obligation even where the landlord alleges you caused the condition.
Lease Clauses That Shift Mold Costs
Section 27-2017.12 voids them. No owner may ask you to waive the benefit or protection of any provision of the mold and pest article, and an agreement purporting to do it "is void". An owner who violates that section is guilty of a misdemeanor punishable by a fine of up to $500 or up to six months in jail or both, and is liable for a civil penalty of up to $500 per violation. A mold addendum assigning remediation to the tenant falls inside that.
Emergency Repair Charges and Tax Liens
An owner who lets a Class C mold violation run past its correction date can end up paying the city's price instead of their own. Under HPD's Emergency Repair Program, HPD and its contractors do the work, the expense is charged to the building, the Department of Finance bills the owner, and an unpaid charge becomes a tax lien that outranks every lien except taxes and assessments and carries interest of at least 7% a year. HPD tells owners that city procurement, contracting and wage rules "may make such work performed by a contractor retained by HPD significantly more expensive than the price the owner could obtain independently", so hiring a mold remediation contractor in time is the cheaper path.
In the year to June 2025, HPD completed 650 mold work orders and vouchered $1,959,739 for completed and attempted mold remediation, the highest total in the five years its report covers. Its average spend on a completed mold emergency repair was $2,089 per apartment. The civil penalty runs alongside. For an immediately hazardous violation, which 30 square feet or more of mold in one room draws, a building with more than five apartments faces $150 to $1,200, plus $150 to $1,200 for every day past the correction date, and another $500 to $1,000 for a false certification. Correcting on time and filing what is needed to clear a mold violation avoids all of it.
HPD's Underlying Conditions Program adds a second layer. It selects 50 to 100 buildings a year and issues an Order to Repair that requires the owner to find the cause, correct it within four months or six with HPD's approval, and file a report by a registered architect or professional engineer on whether the roof or facade is the water source. The 2025 round covered 104 buildings holding 2,952 apartments, and HPD issued 61 of those orders.
Rent While the Mold Is Unresolved
An abatement reduces the rent you owe for the period the apartment was in that condition, and a judge awards it inside a case. Legal Aid describes the usual sequence: the landlord may commence a nonpayment eviction case if you do not pay, and you raise the lack of repairs as a defense and ask the court for an abatement. Compelling the repair is a separate track, and an HP action is the tool for it.
Withholding rent is the risky version of that argument. Legal Aid's instruction is to set the rent money aside and not spend it, because you will need it when the case arrives. You also wait on the landlord's timetable. Talk to a tenant lawyer before you stop paying.
Rent Reduction Orders in Regulated Apartments
For a rent stabilized or rent controlled apartment, one route makes paying less authorized rather than risky. You file a decrease in services complaint with New York State Homes and Community Renewal, on Form RA-81 for your own apartment or online, and on Form RA-84 for a building-wide condition. DHCR serves the owner, may inspect, and can order services restored and the rent reduced.
Filing early pays. For a stabilized apartment the reduction runs back to the first day of the month following DHCR's service of the complaint on the owner, the amount is generally the most recently charged lease guideline adjustment, and the order bars further rent increases until DHCR issues a rent restoration order. DHCR will not issue that order until every service listed is corrected. Thirty days on with nothing fixed, you can file Form RA-22.1 and reduce your rent in line with the order.
Money You Have Already Spent
Paying a contractor yourself and taking it off the rent is allowed in narrow circumstances and expensive when done wrong. Legal Aid's conditions are notice to the landlord, a reasonable time for them to act, a condition that endangers life, health or safety or interferes with your ability to live in the apartment, and a cost you can show was reasonable. Miss one and you can owe the repair and the rent, with an eviction proceeding running.
A receipt sits better in a nonpayment case or small claims court. Housing Court Answers lists among the defenses to a nonpayment case that you paid for repairs the landlord should have paid for, and that your belongings were damaged because the landlord failed to make repairs, while warning that some defenses are hard to prove without a lawyer. Small claims handles the money claim alone, with a filing fee of $15 up to $1,000 and $20 above that.
Renters Insurance and Mold Damage
A renters policy insures your belongings, not the apartment. The Department of Financial Services puts the split plainly: a landlord does not provide insurance for a tenant's personal property, while the building owner may have insurance on the building.
DFS also tells consumers that mold damage is covered if it is due to a covered event, and that many policies carry a mold limitation on what they pay for remediation services. Wear and tear sits on the standard exclusion list alongside flood. Read your own policy wording, and do not treat a claim as a replacement for the owner's duty.
The Building Record Behind Your Claim
The argument turns on dates and on what the city wrote down. Open mold violations with their class and correction dates, the complaints behind them, and any legal action HPD has brought against the building sit in public records, and you can look up any NYC address to read them. Buildings with three or more apartments carry 30.1 HPD violations per 100 apartments citywide as of September 2026, 9.2 of them Class C, so a long mold and leak history stands out.
Frequently Asked Questions
Can my landlord charge me for mold damage?
Only by showing you caused it through a wilful act or gross negligence, which section 27-2006 defines narrowly and which takes dated evidence. A remediation charge added to your ledger without that showing is one you can dispute, and the owner's duty to do the work survives either way.
Do I have to pay rent if my apartment has mold?
Yes, until a judge or DHCR reduces it. An abatement is a court order and a rent reduction is a DHCR order, and neither follows from your own view of what the apartment is worth now. If you withhold, set the money aside and expect a nonpayment case in which you raise the conditions as a defense.
If mold grew because I did not ventilate the bathroom, do I pay for the removal?
The code does not put that on you. Leaving a fan off is ordinary carelessness, and a tenant carries a violation only for a wilful act or gross negligence. Mold that returns in a bathroom usually has a water source behind it, and the owner has to find and correct that defect as part of the same job.
Does renters insurance cover mold remediation?
Sometimes, and only for your own property. The Department of Financial Services says mold damage is covered if a covered event caused it, and that many policies carry a mold limitation on remediation payments. Wear and tear is a standard exclusion. Remediating the apartment stays the owner's cost whatever your policy pays you.
Can I hire my own mold contractor and take it off the rent?
Only on strict conditions. Legal Aid's list is notice to the landlord, a reasonable time to act, a condition that endangers life, health or safety or interferes with your ability to live in the apartment, and a cost you can show was reasonable. Get one wrong and you can owe both the repair and the rent, with an eviction case attached.
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