9 St Marks Avenue
9 St Marks Avenue in Park Slope, Brooklyn, has 2 open HPD violations, 2 of them class C, and no rent-stabilized units are on its tax bill, as of Oct 26, 2026. StreetSpy grade: D (59/100).
Multi-family walk-up · 8 units · Built 1889
StreetSpy grade: D (Poor, 59/100)
- 2 immediately hazardous violations open (the class that covers no heat, pests, lead paint and similar).
- The head officer on this registration is named on 40 buildings' registrations; 14 graded D or F.
- Had 4 rent-stabilized units on the 2007 tax bill and none on the latest one; ask how the apartment left stabilization.
- Repairs: Medium (2 open, 2 class C), records as of Oct 26, 2026
- Heat and hot water: 1 complaint, 12 mo, records as of Oct 25, 2026
- Pests: Clear (Owner reported none, 3 yr), records as of Oct 28, 2026
- Safety: Medium (1 open DOB violation), records as of Oct 26, 2026
- Registration: Through Sep 1, 2027, records as of Oct 3, 2026
Housing code violations (HPD)
2 open violations: 2 class C (immediately hazardous), 0 class B, 0 class A. 14 issued in the last 12 months. 104 on record. Oldest open violation issued 2023-08-29. Newest violation issued 2026-06-15.
6 closed in the last 90 days. Median 79 days from issue to close for the 14 violations closed in the last 12 months.
- Class C: Roaches, throughout the apartment, 1st floor. HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT APT 1R, 1st STORY, 2nd APARTMENT FROM NORTH AT EAST (apt 1R), issued 2023-08-29. HPD violation 16189688
- Class C: Mice, throughout the apartment, 1st floor. HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF MICE IN THE ENTIRE APARTMENT LOCATED AT APT 1R, 1st STORY, 2nd APARTMENT FROM NORTH AT EAST (apt 1R), issued 2023-08-29. HPD violation 16189689
311 housing complaints
8 in the last 12 months, 13 in 5 years. Most common: Water Leak (4), Door/Window (1), Heat/Hot Water (1), Paint/Plaster (1), Unsanitary Condition (1).
Bedbugs
The owner reported 0 infested units in the last 3 years of filings. HPD's bedbug filings are self-reported by the owner once a year; HPD does not inspect to confirm them.
- 2026: No bedbug filing on record for this year
- 2025: Owner reported 0 infested units
- 2024: Owner reported 0 infested units
- 2023: Owner reported 0 infested units
- 2022: Owner reported 0 infested units
- 2021: Owner reported 0 infested units
Buildings department (DOB)
1 open DOB violation, a Local Law violation issued before 2000. 1 DOB violation on record. Check on DOB BIS.
Evictions and housing court
0 executed evictions in the last 3 years (0 on record). 0 open HPD cases; 0 harassment findings.
Rent stabilization
No rent-stabilized units on the tax bill.
Owner and management
Owner: 9 ST MARKS AVENUE LLC. Head officer: MARK WEINBERGER. Managing agent: 9 ST MARKS AVENUE LLC. This owner has 40 buildings on record, 14 graded D or F. See the full portfolio.
Last HPD registration Jul 28, 2026, valid through Sep 1, 2027.
Tax lot and city IDs
BBL 3009330073, HPD building ID 375039. HPD Online, ACRIS, DOB BIS.
Nearest subway
- Bergen St (2, 3), 2 min walk
- Atlantic Av-Barclays Ctr (D, N, R), 4 min walk
- Atlantic Av-Barclays Ctr (2, 3, 4, 5), 5 min walk
How the grade is calculated
| Factor | On record | Points |
|---|---|---|
| Open HPD violations | 2 open (2 class C) | −18 |
| 311 housing complaints (12 mo) | 8 | −20 |
| Bedbug reports (3 yr) | None reported | 0 |
| Executed evictions (3 yr) | None | 0 |
| Housing litigation | No open cases | 0 |
| Open DOB violations | 1 open DOB violation, a Local Law violation issued before 2000 | −3 |
Sources: NYC HPD Housing Maintenance Code Violations, NYC 311 Service Requests, NYC HPD Bedbug Reporting, NYC Marshal Evictions (DOI), NYC HPD Housing Litigations, NYC DOB Violations, NYC DOF tax bills (via JustFix Who Owns What portfolio API, v2), NYC HPD Property Registration. Methodology. Report generated 2026-10-28.