Bronx mold violation help: sorted by class, with the clock running
If a city inspector has written up mold or a leak in your building, the correction deadline depends on how big it is, and the right licensed companies need to be lined up early.
Signs this job fits a building in the Bronx
You received a Housing Preservation and Development notice
The class on the notice sets the deadline: 90 days for class A, 30 for class B and 21 for class C.
A tenant complained and nothing changed
HPD's advice to tenants is to tell the landlord first and bring the city in only if the hazard stays or the repair is done unsafely.
An earlier violation was not corrected
HPD upgrades an uncorrected class A to B, and a class B to C, and the upgraded violation carries the shorter correction period of its new class.
Your building is on a watch list
Buildings left with uncorrected class B or C mold or leak violations can be placed in the Underlying Conditions Program.
Common questions
Who writes a Bronx mold violation, and who checks the licensed work?
City housing inspectors record the violation. Separately, the city's Department of Environmental Protection collects the before and after certifications from licensed remediators on residential jobs and can act against owners who skip the proper work.
Can I fix a violation myself?
For mold over ten square feet in a building of ten or more apartments, the city law bars owners and managers from doing the work and calls for licensed firms. Smaller buildings follow other rules, so check the size of yours.
What do I send to close it out?
The owner's certification of correction goes to the city with sworn statements from the remediator and the assessor, plus proof of the filings made with the city's environmental protection department where licensed workers were required.
Violation Help in the Bronx
The Bronx is where this problem is biggest. City inspectors recorded about 20,400 mold violations here in 2024, the most of any borough. In HPD's 2025 Underlying Conditions round, 57 of the 104 buildings picked citywide were in the Bronx; they held 764 of the 1,367 qualifying violations, and 34 of the 61 orders went to Bronx buildings.
So if you are holding a notice, you are not an outlier, but you also cannot treat it as routine. A violation is sized by room: under 10 square feet is class A, 10 to 29 is class B and 30 or more is class C. Leaving it uncorrected or certifying falsely raises the class, and a persistent pattern can bring an order to produce an architect's or engineer's report on the water source and to address it within four months.
The correction itself has to match the size. Where Article 32 or the city code requires licensed workers, the owner's sign-off has to be backed by sworn statements from both the remediator and the assessor, and by proof that the plan and the assessor's closing report were sent to the city's environmental protection department. Lining up two separate companies takes a little time, so start before the deadline looks close.
Housing Preservation and Development classifies a mold violation as class A, B or C with 90, 30 or 21 days to correct, and the certification of correction needs both licensees' affidavits where Article 32 applies. Source: Housing Preservation and Development Housing Maintenance Code Violations, New York City Open Data, FY25 Indoor Allergen Hazard Report, New York City Department of Housing Preservation and Development, New York City Department of Housing Preservation and Development, Rules of the City of New York title 28 chapter 54, New York City Department of Housing Preservation and Development