510 West 123rd Street
510 West 123rd Street in Morningside Heights, Manhattan, has 2 open HPD violations, 1 of them class C, and no rent-stabilized units are on its tax bill, as of Oct 25, 2026. StreetSpy grade: A (96/100).
Co-op · Multi-family elevator · 48 units · Built 1926
A cooperative: apartments are owned as shares, so a rental here is a sublet that usually needs board approval and may be limited to one or two years. Co-op units are not rent-stabilized.
StreetSpy grade: A (Excellent, 96/100)
- 1 immediately hazardous violation open (the class that covers no heat, pests, lead paint and similar).
- Had 1 rent-stabilized unit on the 2007 tax bill and none on the latest one; ask how the apartment left stabilization.
- No housing complaints to 311 in the last 12 months.
- Repairs: Low (2 open, 1 class C), records as of Oct 25, 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 (No open DOB violations), records as of Oct 23, 2026
- Registration: Renewal not yet in city data, records as of Oct 3, 2026
Housing code violations (HPD)
2 open violations: 1 class C (immediately hazardous), 1 class B, 0 class A. 1 issued in the last 12 months. 71 on record. Oldest open violation issued 2021-06-24. Newest violation issued 2026-04-29.
0 closed in the last 90 days. Median 22 days from issue to close for the 1 violations closed in the last 12 months.
- Class C: Self-closing door not working (entrance). , 27-2007, 27-2041.1 HMC, §238, § 309; § 107 (2) ( C) MDL AND 28 RCNY §25-171: REPLACE OR REPAIR THE SELF-CLOSING DOORS THAT IS MISSING OR DEFECTIVE LATCH SET AT VESTIBULE DOOR , 1st STORY, issued 2025-05-12. HPD violation 17885752
- Class B: Mold, ceiling, bathroom, 1st floor. HMC: TRACE AND REPAIR THE SOURCE AND ABATE THE VISIBLE MOLD CONDITION... AT CEILING IN THE BATHROOM LOCATED AT APT 4, 1st STORY, 1st APARTMENT FROM EAST AT SOUTH (apt 4), issued 2021-06-24. HPD violation 14381442
311 housing complaints
0 in the last 12 months, 3 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: Owner reported 0 infested units
- 2021: Owner reported 0 infested units
Buildings department (DOB)
No open DOB violations. 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.
Rent-stabilized units on city tax bills: 0 in 2024, 1 in 2007. Source: DOF tax bills for 2007 and 2024; years with no bill on file are left out.
Owner and management
Owner: 510 WEST 123RD STREET OWNERS CORP. Head officer: MARK KUHRT. Managing agent: SYNOPTIC MANAGEMENT CORP. See the full portfolio.
Last HPD registration Jul 28, 2025. Registration on file through Sep 1, 2026; renewal not yet in the city's data.
Tax lot and city IDs
BBL 1019770037, HPD building ID 39381. HPD Online, ACRIS, DOB BIS.
Nearest subway
- 125 St (1), 6 min walk
- 125 St (A, C, B, D), 7 min walk
- 116 St-Columbia University (1), 8 min walk
How the grade is calculated
| Factor | On record | Points |
|---|---|---|
| Open HPD violations | 2 open (1 class C, 1 class B) | −4 |
| 311 housing complaints (12 mo) | None | 0 |
| Bedbug reports (3 yr) | None reported | 0 |
| Executed evictions (3 yr) | None | 0 |
| Housing litigation | No open cases | 0 |
| Open DOB violations | None | 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 2026-10-28.