646 West End Avenue

646 West End Avenue in Upper West Side, Manhattan, has 41 open HPD violations, 4 of them class C, and 13 of 18 units are rent-stabilized, as of Oct 26, 2026. StreetSpy grade: D (60/100).

Mixed residential & commercial · 18 units · Built 1895

StreetSpy grade: D (Poor, 60/100)

• 4 immediately hazardous violations open (the class that covers no heat, pests, lead paint and similar).
• 2 open violations are classified rent-impairing under NY Multiple Dwelling Law section 302-a.
• No housing complaints to 311 in the last 12 months.
• 13 of 18 units are rent-stabilized.

More open violations per unit than 8 in 10 Manhattan buildings this size.

• Repairs: High (41 open, 4 class C), records as of Oct 26, 2026
• Heat and hot water: No complaints, 12 mo, records as of Oct 25, 2026
• Pests: Clear (Owner reported none, 3 yr), records as of Oct 27, 2026
• Safety: Clear (1 open DOB violation), records as of Oct 26, 2026
• Registration: Renewal not yet in city data, records as of Oct 3, 2026

How the grade works

Housing code violations (HPD)

41 open violations: 4 class C (immediately hazardous), 13 class B, 24 class A. 0 issued in the last 12 months. 135 on record. Oldest open violation issued 2019-08-07. Newest violation issued 2025-09-02.

0 closed in the last 90 days. Median 78 days from issue to close for the 7 violations closed in the last 12 months.

2 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: Self-closing door not working, 2nd floor. , 2007, 204.1 HMC CODE: ARRANGE AND MAKE SELF-CLOSING THE DOORS .... IN THE ENTRANCE LOCATED AT APT 2B, 2nd STORY, 2nd APARTMENT FROM EAST AT SOUTH (apt 2B), issued 2021-09-03. HPD violation 14528415
• Class C: Mold, east wall, kitchen, 2nd floor. HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... AT EAST WALL IN THE KITCHEN LOCATED AT APT 2B, 2nd STORY, 2nd APARTMENT FROM EAST AT SOUTH (apt 2B), issued 2021-09-03. HPD violation 14528410
• Class C: No heat / heating defect (hallway). POST NOTICE, IN FORM APPROVED BY THE DEPARTMENT, STATING THE NAME AND LOCATION OF THE PERSON DESIGNATED BY THE OWNER TO HAVE KEY TO BUILDINGS HEATING SYSTEM .. AT PUBLIC HALL, 1st STORY, issued 2019-08-07. HPD violation 11724208
• Class C: No heat / heating defect. POST NOTICE, IN FORM APPROVED BY THE DEPARTMENT, STATING THE NAME AND LOCATION OF THE PERSON DESIGNATED BY THE OWNER TO HAVE KEY TO BUILDINGS HEATING SYSTEM NEAR OR BY MAILBOX , 1st STORY, issued 2019-08-07. HPD violation 11110029
• Class B: No heat / heating defect, 1st room from the east, 5th floor. & 309 M/D LAW ABATE THE NUISANCE CONSISTING OF RADIATOR PRODUCING HEAT DURING NON HEAT SEASON IN THE 1st ROOM FROM EAST LOCATED AT APT 5D, 5th STORY, 2nd APARTMENT FROM NORTH AT EAST (apt 5D), issued 2022-07-05. HPD violation 15239715
• Class B: Missing or broken smoke / CO detector, throughout the apartment, 3rd floor. REPAIR OR REPLACE THE SMOKE DETECTOR DEFECTIVE IN THE ENTIRE APARTMENT LOCATED AT APT 3B, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTH (apt 3B), issued 2021-12-13. HPD violation 14720399
• Class B: Plumbing defect, kitchen, 3rd floor. PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE WOOD BASE CABINET AT SINK IN THE KITCHEN LOCATED AT APT 3B, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTH (apt 3B), issued 2021-12-13. HPD violation 14720398
• Class B: Missing or broken smoke / CO detector, throughout the apartment, 3rd floor. HMC: REPAIR OR REPLACE THE CARBON MONOXIDE DETECTING DEVICE(S). DEFECTIVE IN THE ENTIRE APARTMENT LOCATED AT APT 3B, 3rd STORY, 1st APARTMENT FROM EAST AT SOUTH (apt 3B), issued 2021-12-13. HPD violation 14720400

311 housing complaints

0 in the last 12 months, 26 in 5 years.

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: No bedbug filing on record for this year
• 2021: Owner reported 0 infested units

Buildings department (DOB)

1 open DOB violation. 5 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

13 of 18 units rent-stabilized as of 2024. Stabilized renewals: 0% for one year and 0% for two years under RGB Order #58 (Oct 1, 2026 to Sep 30, 2027).

Owner and management

Owner: WEST SIDE KOLLEL TORAH CENTER. Head officer: DON BLUMBERG. Managing agent: WSK MANAGEMENT. See the full portfolio.

Last HPD registration Jun 26, 2025. Registration on file through Sep 1, 2026; renewal not yet in the city's data.

Tax lot and city IDs

BBL 1012390004, HPD building ID 44088. HPD Online, ACRIS, DOB BIS.

Nearest subway

• 96 St (1, 2, 3), 4 min walk
• 86 St (1), 5 min walk
• 86 St (C, B), 11 min walk

How the grade is calculated

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.