641 St Marks Avenue
641 St Marks Avenue in Crown Heights, Brooklyn, has 158 open HPD violations, 41 of them class C, and no rent-stabilized units are on its tax bill, as of Oct 24, 2026. StreetSpy grade: F (35/100).
Multi-family walk-up · 30 units · Built 1900
StreetSpy grade: F (Severe, 35/100)
- 41 immediately hazardous violations open (the class that covers no heat, pests, lead paint and similar).
- 20 open violations are classified rent-impairing under NY Multiple Dwelling Law section 302-a.
- 16 heat or hot water complaints to 311 in the last 12 months.
More open violations per unit than 9 in 10 Brooklyn buildings this size.
- Repairs: High (158 open, 41 class C), records as of Oct 24, 2026
- Heat and hot water: 16 complaints, 12 mo, records as of Oct 23, 2026
- Pests: Clear (Owner reported none, 3 yr), records as of Oct 26, 2026
- Safety: Clear (1 open DOB violation), records as of Oct 23, 2026
- Registration: Expired Sep 1, 2025, records as of Oct 3, 2026
Housing code violations (HPD)
158 open violations: 41 class C (immediately hazardous), 97 class B, 18 class A, 2 class I (HPD orders such as lead paint or heat orders, not a hazard class). 28 issued in the last 12 months. 450 on record. Oldest open violation issued 2017-08-04. Newest violation issued 2026-09-28.
1 closed in the last 90 days. Median 45 days from issue to close for the 9 violations closed in the last 12 months.
20 open violations are classified rent-impairing under NY Multiple Dwelling Law section 302-a. Section 302-a; NY Courts guidance on getting repairs.
- Class C: No hot water, throughout the apartment, 4th floor. PROVIDE HOT WATER AT ALL HOT WATER FIXTURES IN THE ENTIRE APARTMENT LOCATED AT APT 4D, 4th STORY, 2nd APARTMENT FROM NORTH AT EAST , SECTION AT WEST (apt 4D), issued 2026-07-24. HPD violation 19092904
- Class C: No heat / heating defect (basement). PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM LOCKED DOOR AT BASEMENT AT BOILER ROOM, issued 2026-07-24. HPD violation 19092905
- Class C: No heat / heating defect (basement). PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM DOOR LOCKED AT CELLAR AT BOILER ROOM, issued 2026-06-15. HPD violation 19005868
- Class C: Mice, throughout the apartment, 2nd floor. HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF MICE IN THE ENTIRE APARTMENT LOCATED AT APT 2H, 2nd STORY, 1st APARTMENT FROM NORTH AT EAST (apt 2H), issued 2026-06-15. HPD violation 19005869
- Class C: No heat / heating defect (basement). PROVIDE READY ACCESS TO BUILDINGS HEATING SYSTEM DOOR LOCKED AT BASEMENT AT BOILER ROOM, issued 2026-06-15. HPD violation 19005596
- Class C: No hot water, throughout the apartment, 3rd floor. PROVIDE HOT WATER AT ALL HOT WATER FIXTURES IN THE ENTIRE APARTMENT LOCATED AT APT 3D, 3rd STORY, 2nd APARTMENT FROM NORTH AT EAST (apt 3D), issued 2026-06-15. HPD violation 19005595
- Class C: Rats (hallway). 567 (C) § 27-2017, 27-2017.1, 27-2017.4, 27-2017.5, 27-2017.8, 27-2019, 27-2021 HMC: ABATE THE NUISANCE CONSISTING OF EVIDENCE OF RATS AND ALL UNDERLYING CAUSES CREATING THE PEST INFESTATIONS, BY USING INTEGRATED PEST MANAGEMENT (IPM), ELIMINATE ALL BURROW ENTRY AND PASSAGEWAYS, PEST NESTS, HOLES, GAPS OR CRACKS IN WALLS, CEILINGS, FLOORS, FIXING LEAKS AND MANAGING GARBAGE IN PUBLIC AREAS. EVIDENCE FOUND AT ... YARD, issued 2025-11-18. HPD violation 18379668
- Class C: Roaches, throughout the apartment, 3rd floor. HMC ADM CODE: § 27-2017.4 ABATE THE INFESTATION CONSISTING OF ROACHES IN THE ENTIRE APARTMENT LOCATED AT APT 3G, 3rd STORY, 1st APARTMENT FROM NORTH AT EAST (apt 3G), issued 2025-10-27. HPD violation 18330357
311 housing complaints
31 in the last 12 months, 204 in 5 years. Most common: Heat/Hot Water (16), Unsanitary Condition (6), Paint/Plaster (3), Water Leak (3), Door/Window (2).
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: No bedbug filing on record for this year
- 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. 2 DOB violations 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: PROSPECT HEIGHTS 637-641 REALTY LLC. Head officer: JOE PATRICKOWSKI. Managing agent: WATERSTONE GROUP LLC. This owner has 13 buildings on record, 9 graded D or F. See the full portfolio.
Last HPD registration Oct 9, 2024. HPD registration expired Sep 1, 2025 and had not been renewed as of Oct 3, 2026. Buildings with 3+ units must register with HPD every year.
Tax lot and city IDs
BBL 3012190069, HPD building ID 374924. HPD Online, ACRIS, DOB BIS.
Nearest subway
- Park Pl (S), 6 min walk
- Nostrand Av (A, C), 7 min walk
- Franklin Av (S), 8 min walk
How the grade is calculated
| Factor | On record | Points |
|---|---|---|
| Open HPD violations | 158 open (41 class C, 97 class B, 18 class A, 2 class I). 20 rent-impairing | −45 |
| 311 housing complaints (12 mo) | 31 | −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 | 0 |
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 2026-10-27.