Mold violations in Brooklyn.
HPD has written 41,282 mold violations in Brooklyn, 30.8% of the city’s total.
See what is open on one building.
38,125 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. 1,160 Class C mold violations here have sat open more than a year with no certification on file.
Our current feed holds 833 Brooklyn case files across all categories, and 434 of them carry ten or more open Class C hazards. The median file carries 15. We can send a hand-checked file of the open Class C mold violations here.
Get leads for your boroughsPreview 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, 3,870. June has the fewest, 2,812.
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 3,402 Class C mold violations, immediately hazardous, correct within 21 days. It has issued 17,677 Class B, hazardous, correct within 30 days, and 20,203 Class A, not hazardous, correct within 90 days. The windows are from HPD's correction table.
Class C is 8.2% of the 41,282 mold violations recorded in Brooklyn.
How often Brooklyn mold violations get certified corrected
Two numbers sum up Brooklyn on Class C mold. One is 576, the violations certified corrected out of 3,402, 16.9%, filed at a median of 33 days and a 90th percentile of 231. The other is 1,160, the violations past a year with no certification at all.
When an inspector goes back and finds the condition still there, HPD marks the violation Not Complied With. In Brooklyn that is 2.2% 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, which HPD does not accept. Documents with a defect become Invalid Certification, to be filed again. A certification an inspector contradicts becomes False Certification. An inspector who sees the fix while documents are missing leaves Defect Letter Issued. Every one of those has a page in the glossary.
Brooklyn against the rest of New York City
Brooklyn has 41,282 of the city’s 134,108 mold violations, 30.8%. Here is every borough’s total for the same category.
| Borough | Mold violations |
|---|---|
| Bronx | 54,926 |
| Brooklyn | 41,282 |
| Manhattan | 20,123 |
| Queens | 14,665 |
| Staten Island | 3,112 |
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 | 485 |
| Lincoln Avenue | 447 |
| Eldert Lane | 390 |
| East 21 Street | 225 |
| Eastern Parkway | 199 |
| Nostrand Avenue | 188 |
| Linden Boulevard | 180 |
| St Johns Place | 163 |
Open means HPD still lists the violation as open.
Brooklyn buildings with open mold violations
12 of the 1,522 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 October 17, 2026.
- 8517 3 Avenue, Brooklyn 2 open Class C mold violations
- 3813 18 Avenue, Brooklyn 8 open mold violations
- 460 52 Street, Brooklyn 2 open Class C mold violations
- 3210 Avenue H, Brooklyn 1 open mold violation
- 3091 Brighton 5 Street, Brooklyn 1 open Class C mold violation
- 55 East 21 Street, Brooklyn 10 open Class C mold violations
- 9228 Glenwood Road, Brooklyn 2 open Class C mold violations
- 116 Lenox Road, Brooklyn 10 open mold violations
- 871 Montgomery Street, Brooklyn 2 open Class C mold violations
- 2400 Nostrand Avenue, Brooklyn 4 open Class C mold violations
- 894 Park Place, Brooklyn 1 open Class C mold violation
- 1568A Prospect Place, Brooklyn 2 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 October 17, 2026, read on October 19, 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: 41,282 mold violations in Brooklyn. The buildings listed above link to their own pages; no owner is named here. Citywide, this week’s docket, ViolationScout.