Mold violations in Brooklyn.
HPD has written 40,428 mold violations in Brooklyn, 30.8% of the city’s total.
See what is open on one building.
38,238 mold violations cited in Brooklyn over the last three years.
What this means
A mold violation means the owner has to correct the condition under the housing maintenance code, and larger mold jobs fall under Local Law 55 as well. HPD tracks each cited condition until the owner certifies the correction.
If you own the building. An open mold violation is a fact about the building that outlasts whoever owns it. It shows at sale and at refinance until HPD accepts a certification, dismisses it or closes it on review. Of those, certification is the one an owner controls. What to do if it is your building.
If you work Brooklyn for a living. 1,130 Class C mold violations here have sat open more than a year with no certification on file.
Our current feed holds 821 Brooklyn case files across all categories, and 438 of them carry ten or more open Class C hazards. The median file carries 17. We can send a hand-checked file of the open Class C mold violations here.
Request a sample filePreview the Brooklyn feed
If you rent here. These are conditions an inspector confirmed. HPD’s data does not show whether they were fixed, only whether the owner ever certified a repair. What each status means.
Brooklyn, by category: Heat and hot water, Lead paint, Vermin and pests, Water leaks, Electrical. All five boroughs
How an HPD mold violation gets issued
Most of these violations start with a tenant's call to 311. HPD schedules an inspection, and if the inspector confirms the condition, HPD issues a violation and mails the owner a Notice of Violation. From then on anyone can look it up on HPD Online by address, and it stays open until HPD accepts a correction or closes the case another way. See how HPD, DOB, and OATH/ECB fit together.
When Brooklyn mold violations are cited, by month
Mold violations HPD has cited in Brooklyn, by calendar month, over the last 36 complete months, so every month is counted across the same three years. October has the most, 3,869. June has the fewest, 2,665.
Mold violations by class: A, B and C
HPD sorts every mold violation into one of three classes, and the class sets the correction window and how urgently an owner must act. In Brooklyn, HPD has issued 3,365 Class C mold violations, immediately hazardous, correct within 24 hours. It has issued 17,374 Class B, hazardous, correct within 30 days, and 19,689 Class A, not hazardous, correct within 90 days.
Class C is 8.3% of the 40,428 mold violations recorded in Brooklyn.
How often Brooklyn mold violations get certified corrected
Two numbers sum up Brooklyn on Class C mold. One is 569, the violations certified corrected out of 3,365, 16.9%, filed at a median of 33 days and a 90th percentile of 228. The other is 1,130, the violations past a year with no certification at all.
Once a certify-by date passes unanswered, HPD marks the violation Not Complied With. In Brooklyn that is 2.3% of mold violations.
What happens after an HPD certification is filed
Two things decide the next status: the certify-by date and HPD’s review. Filed inside the date, a certification shows NOV Certified On Time; filed outside it, NOV Certified Late, and the missed window stays visible. Paperwork HPD finds insufficient becomes Defect Letter Issued, to be filed again. A certification an inspector contradicts becomes Invalid Certification. Every one of those has a page in the glossary.
Brooklyn against the rest of New York City
Brooklyn has 40,428 of the city’s 131,470 mold violations, 30.8%. Here is every borough’s total for the same category.
| Borough | Mold violations |
|---|---|
| Bronx | 53,918 |
| Brooklyn | 40,428 |
| Manhattan | 19,708 |
| Queens | 14,379 |
| Staten Island | 3,037 |
Which Brooklyn streets carry the most open mold violations
These are the Brooklyn streets carrying the most open mold violations.
| Street | Open violations |
|---|---|
| Ocean Avenue | 475 |
| Lincoln Avenue | 447 |
| Eldert Lane | 384 |
| East 21 Street | 220 |
| Eastern Parkway | 207 |
| Nostrand Avenue | 183 |
| Linden Boulevard | 173 |
| East 93 Street | 159 |
Open means HPD still lists the violation as open.
Brooklyn buildings with open mold violations
12 of the 1,530 Brooklyn buildings with open mold violations and a page here, a different 12 each week, listed by street. Each count covers mold violations only, counted on September 27, 2026.
- 426 49 Street, Brooklyn 1 open mold violation
- 580 52 Street, Brooklyn 2 open mold violations
- 2331 Dean Street, Brooklyn 4 open mold violations
- 240 East 18 Street, Brooklyn 1 open mold violation
- 5 East 93 Street, Brooklyn 32 open Class C mold violations
- 1449 Fulton Street, Brooklyn 4 open mold violations
- 1925 Glenwood Road, Brooklyn 4 open Class C mold violations
- 152 Marcus Garvey Boulevard, Brooklyn 2 open mold violations
- 333 Mc Donald Avenue, Brooklyn 1 open mold violation
- 694 Pennsylvania Avenue, Brooklyn 1 open mold violation
- 556 Thomas S Boyland Street, Brooklyn 1 open mold violation
- 564 Wyona Street, Brooklyn 7 open mold violations
Every HPD status on Brooklyn mold violations
Every current status HPD has given a mold violation in Brooklyn, most common first. Each name links to its own page in the glossary.
Cite this page
ViolationScout, Brooklyn mold violations, read from our copy of HPD's Housing Maintenance Code Violations dataset (NYC Open Data, wvxf-dwi5). Figures through September 27, 2026, read on September 29, 2026. https://violationscout.com/nyc/brooklyn-mold
Monthly, class, certification, street and status figures count HPD violations whose description matches mold in Brooklyn; the three-year count at the top is read from the city's open-data API when the page is built. Source: NYC Open Data. How every figure here is counted: /methodology.
The tables count violations across the borough, from our copy of HPD’s data: 40,428 mold violations in Brooklyn. The buildings listed above link to their own pages; no owner is named here. Citywide, this week’s docket, ViolationScout.