How to clear an HPD mold violation
Fix the moisture source, have the mold assessed and removed by the right licensed professionals for your building, get a post-remediation clearance, then certify the correction to HPD before the deadline on the notice, with the supporting documents. HPD may reinspect to confirm.
- Read the notice. Mold violations are HPD order number 550. The notice gives the class, the apartment and room, and the date to certify by. To see every open violation in a building, enter its address on HPDONLINE.
- Find and fix the moisture. A leak, a roof or facade problem, or poor bathroom ventilation. Cleaning without fixing the source is the most common reason mold comes back.
- Get an assessment. A licensed mold assessor measures the affected area, finds the likely source and writes a remediation work plan.
- Remediate. A licensed remediator does the work to the plan, filing with DEP first where Local Law 61 applies.
- Clearance. The assessor checks the work and, for covered buildings, files the post-remediation assessment with DEP within 7 days of the work being finished.
- Certify to HPD. Submit the certification of correction with the supporting documents. For Class B and C mold violations in buildings with 10 or more apartments, that includes affidavits from the licensed assessor and the licensed remediator. Mold violations can't be certified through HPD's online eCertification, so the certification goes in on paper.
Certifying a violation as corrected when it isn't can lead to penalties for false certification, so the documents need to match what was really done.
Violation classes and deadlines
HPD classes mold violations in an apartment by the size of the growth:
| Class | Mold in the apartment | Time to correct |
|---|---|---|
| Class A | Under 10 sq ft in a room | 90 days |
| Class B | 10 to 29 sq ft in a room | 30 days |
| Class C | 30 sq ft or more in a room | 21 days |
Deadlines run from the date the violation is served. A violation that isn't corrected and certified in time can be upgraded to a higher class. Always go by the dates on your own notice.
Documents to send HPD with the certification
What HPD asks for depends on the size of the building and the class of the violation:
Under 10 apartments, or a one- or two-family house
Class A, B or C
- Certification of correction
- If licensed contractors did the work: copies of the mold assessment license and the mold remediation (or remediation supervisor) license
10 or more apartments
Class A (under 10 sq ft in a room)
- Certification of correction
- If licensed contractors did the work: copies of the mold assessment license and the mold remediation (or remediation supervisor) license
10 or more apartments
Class B or C (10 sq ft or more in a room)
- Certification of correction
- Copies of the mold assessment license and the mold remediation (or remediation supervisor) license
- Affidavit of remediation and affidavit of assessment
- DEP filing receipts, from the remediator and the assessor
In smaller buildings, and for Class A in larger ones, the owner, the managing agent or their employees may do the work themselves using safe work practices. Then the certification of correction is all HPD needs.
If the deadline passes
An owner who doesn't correct and certify a violation in time can face civil penalties and inspection fees. For immediately hazardous conditions, HPD can send its Emergency Repair Program to do the work and bill the property.
- Late or uncorrected: clearing the violation may then need a reinspection, which you ask for with a Dismissal Request application and a fee. HPD can issue new violations at that inspection.
- Certified but not really fixed: the violation stays open in False Certification status, and the owner can face civil penalties. Tenants can challenge a certification, and HPD may then audit it with an inspection.
The quickest way to close a violation is to fix it properly the first time and send the right documents before the date on the notice.
Which rules apply to your building
- 3 or more apartments: Local Law 55
- Inspect each occupied apartment and all common areas for mold and pests at least once a year, fix the moisture behind it using safe work practices, and respond to complaints. More on Local Law 55
- 10 or more apartments: Local Law 61
- For mold of 10 square feet or more, use a licensed mold assessor and a licensed mold remediator. Owners and their own staff can't do this work themselves.
- Before the work: DEP notice
- The remediator files the work plan notice with DEP at least two business days before remediation starts.
- After the work: DEP notice
- The assessor files the post-remediation assessment notice with DEP within 7 days of the work being finished.
Local Law 61 also covers buildings on zoning lots with 25,000 square feet or more of non-residential floor area.
How SBG helps
- Before the visit, we check the building's HPD violation history on NYC Open Data, so we know about open mold violations before we arrive.
- Mold removal: we do the work to the assessor's plan, file the DEP work plan notice and sign the remediator's affidavit.
- Assessment and clearance: we inspect, measure, find the source, write the work plan, check the finished work, file with DEP and sign the assessor's affidavit.
- In writing: every report lists the areas, readings, sources and photos, so your certification is backed by facts.
Sources
- HPD: Clear violations (deadlines and certification)
- HPD: Indoor allergen hazards (mold and pests)
- HPD: Indoor allergens webinar, July 2024 (violation classes)
- HPD: Finalizing mold certification documents
- NYC DEP: Mold remediation filings
- HPDONLINE: look up a building's violations
- NYC Open Data: Housing Maintenance Code Violations
- Local Law 61 of 2018 (NYC Council)
Rules change. We check this page against the official sources above, but it's a plain-English summary, not legal advice. For your building, go by your own notice, if you have one, and the current rules and guidance from the agencies listed. Last checked November 2026.