643 recorded events, 1900–2026, from 18 city data systems. The city's paper trail here is mostly 131 311 service requests, 104 ACRIS deeds & mortgages, 104 HPD complaints.
Full record, year by year Support this site
The city's published records show little recorded distress here in the last three years. Less recorded distress than 72% of 25-99-unit residential buildings citywide. The citywide median for 25-99-unit residential buildings is 23.6 penalty points per 10 units; this building carries 5.8. In ZIP 10027, 43% of residential buildings hold an A and 14% grade D or F. How grades work
Among 17,252 25-99-unit residential buildings citywide · left is less recorded distress, right is more
| Open HPD violations | 2 total — 1 class C (immediately hazardous), 1 class B, 0 class A. Oldest open since 2021-06-22. |
status snapshot refreshed weekly from HPD records
No heat or hot-water complaints in the last three years.
No bedbug-infested units reported in the last three years of filings.
37 service requests in the last three years. Most common: Noise (18) · Illegal Parking (7) · Rodent (5) · Water System (2) · Lead (2) · Street Condition (1).
$926,870 in permitted construction work filed since 2016 (14 filings with a declared cost) — a rough measure of how actively the owner maintains the building. Permit costs cover filed construction work only — they do not capture routine maintenance or repairs done without a permit.
| Yes | Built before 1974 (1926) |
| Yes | Six or more residential units (48) |
| No | 421-a / J-51 tax benefit on the current tax roll |
2 of 3 signals present. This is the classic profile of a rent-stabilized building (pre-1974, 6+ units) — many units in such buildings remain stabilized. The definitive answer for any unit: request its rent history from NYS Homes & Community Renewal (free, at hcr.ny.gov).
| Registered owner(s) | 510 WEST 123RD STREET OWNERS CORP |
| Head officer | MARK KUHRT |
| Managing agent | SYNOPTIC MANAGEMENT CORP |
| Last registered | 2025-07-28 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $5,559,000 | $2,501,550 |
| 2026 | $5,779,000 | $2,600,550 |
| 2027 | $6,150,000 | $2,767,500 |
The city's market estimate has risen 11% between tax years 2025 and 2027.
Tax exemptions on the roll: SENIOR CITIZEN HOMEOWNER
For property tax, the Department of Finance values this co-op as if it were a rental building. Its 2022 estimate: gross income $1,134,209 a year ($27.52 per sq ft), operating expenses $446,760 ($10.84 per sq ft), net operating income $687,450. These are the city's estimates from comparable rentals, not the building's actual budget, rents or maintenance charges.
| Energy grade (LL33) | A — ENERGY STAR score 86/100 (2022 disclosure cycle) |
| Heating fuel | NATURALGAS |
Not in the FEMA 1%-annual-chance floodplain (2015 preliminary maps).
Not in a hurricane evacuation zone.
Not in the city's stormwater (cloudburst) flood maps under any modeled scenario.
1 street-flooding or sewer-backup complaints at this address since 2019 (0 in the last three years).
Sources: FEMA flood maps (coastal), NYC DEP Stormwater Flood Maps (cloudburst), NYC hurricane evacuation zones, and 311 records for this address.
| Subway | 125 St — 1 · 0.3 mi straight-line (about a 7-minute walk) · station accessibility: none 125 St — A B C D · 0.3 mi straight-line (about an 8-minute walk) · station accessibility: full |
| Bus | Nearest boarding stop: Amsterdam Av / W 123 St — M11 · 150 ft |
| Citi Bike | Morningside Dr & Amsterdam Ave · 500 ft · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: 36, 125. Confirm with the DOE's school search. |
Distances are straight-line, not walking routes. Transit locations from the MTA and Citi Bike, bike facilities from NYC DOT, school zones from the DOE's 2024–25 maps.
510 West 123 Street
| Heat or hot water | Heat or hot water |
| Apartment maintenance | Apartment maintenance |
| Bed bugs | Bed bugs |
| Residential pests | Residential pests |
| Rats or mice | Rats or mice |
| Anything else | Anything else |
37 311 service requests from this address in the last three years.
311 will ask for the address, the apartment if the problem is inside, and what's wrong. Contact details are optional for most complaints; food-poisoning reports can be anonymous. Complaints appear in the city's public 311 data, usually within a day or two, and then in the Live from 311 box on this page.
Managed by SYNOPTIC MANAGEMENT CORP — 91 buildings, 1,632 units. Grades across the portfolio: A71 · B14 · C3 · D1. See the whole portfolio
showing 60 of 91 buildings
Most recent mortgage recorded against this lot: $200,000 on 2021-12-14 (lender: National Consumer Cooperative Bank). Face amount at recording — it may have since been paid down, refinanced or satisfied. View the recorded document.
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 2025-11-14 | RPTT&RET $465,000 — from JAVIER FARFAN, ADMINISTRATOR; FARFAN, JAVIER; ESTATE OF ISABEL ULLOA to SEILER, JORDAN; VINET, FABIENNE | $465,000 | |
| 2025-10-23 | Sold for $465,000 | $465,000 | $9,688 |
| 2025-10-20 | RPTT&RET $313,238 — from DE JONG-LAMBERT, WILLIAM; DE JONG, CHERYL HALINE to DE JONG, CHERYL HALINE | $313,238 | |
| 2025-10-01 | Sold for $121,376 | $121,376 | $2,529 |
| 2025-06-03 | RPTT&RET $490,000 — from PHOEBE BROWN, EXECUTOR; THE ESTATE OF LESTER DAVID BURNETT to CARUSO, MARGARET KATHERINE | $490,000 | |
| 2025-05-28 | Sold for $490,000 | $490,000 | $10,208 |
| 2025-03-07 | RPTT&RET $45,000 — from DAKWAR, JAMIL to KHAMIS, RIM | $45,000 | |
| 2025-02-11 | Sold for $45,000 | $45,000 | $938 |
| 2024-11-08 | RPTT&RET $549,000 — from YUAN, QUAN; ZHANG, WANZHE to DAVID, MARY ANN; DAVID, VICTOR | $549,000 | |
| 2024-10-30 | Sold for $549,000 | $549,000 | $11,438 |
| 2024-10-22 | RPTT&RET $581,000 — from DOGGART, COURTNEY; CASABIAN, EDWARD to SPRINKLE, HELEN | $581,000 | |
| 2024-10-16 | Sold for $581,000 | $581,000 | $12,104 |
| 2024-07-12 | RPTT&RET $415,000 — from ESTATE OF HELEN MILHOLLAND; NANCY MILHOLLAND, EXECUTOR to LITVINOV, GEORGE | $415,000 | |
| 2024-06-13 | Sold for $415,000 | $415,000 | $8,646 |
| 2023-10-12 | RPTT&RET $355,000 — from HORNER, EDWARD; POMEROY CO. to SHERWOOD, SIDAYA; SHERWOOD, MATTHEW | $355,000 |
| Year | Construction | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|---|
| 2017 | 2 | 4 | 17 | 0 | 1 | 24 |
| 2018 | 0 | 5 | 15 | 6 | 4 | 30 |
| 2019 | 2 | 4 | 26 | 0 | 3 | 35 |
| 2020 | 3 | 1 | 5 | 2 | 2 | 13 |
| 2021 | 4 | 2 | 48 | 10 | 7 | 71 |
| 2022 | 2 | 2 | 8 | 2 | 3 | 17 |
| 2023 | 2 | 0 | 7 | 3 | 8 | 20 |
| 2024 | 14 | 0 | 27 | 7 | 5 | 53 |
| 2025 | 0 | 0 | 11 | 9 | 4 | 24 |
| 2026 | 0 | 0 | 7 | 0 | 1 | 8 |
Every one of the 643 recorded events, 1900–2026, is laid out year by year in the full report (print-ready).
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