4,388 recorded events, 2006–2026, from 20 city data systems. The city's paper trail here is mostly 3,190 ACRIS deeds & mortgages, 460 311 service requests, 166 DOB permits.
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 59% of 100+-unit residential buildings citywide. The citywide median for 100+-unit residential buildings is 3.7 penalty points per 10 units; this building carries 2.3. How grades work
Among 4,677 100+-unit residential buildings citywide · left is less recorded distress, right is more
| Open HPD violations | 8 total — 2 class C (immediately hazardous), 2 class B, 4 class A. Oldest open since 2025-02-12. |
status snapshot refreshed weekly from HPD records
14 heat or hot-water complaints in the last three years (winter 2024–25: 10 · winter 2025–26: 4). Repeated winter clusters suggest a chronic heating problem.
No bedbug-infested units reported in the last three years of filings.
$6,250 in enforcement penalties imposed (ECB/OATH) in the last three years.
226 service requests in the last three years. Most common: Illegal Parking (109) · Noise (49) · Encampment (19) · HEAT/HOT WATER (7) · Abandoned Vehicle (5) · UNSANITARY CONDITION (5).
$18,515,991 in permitted construction work filed since 2016 (84 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.
| No | Built before 1974 (2013) |
| Yes | Six or more residential units (274) |
| Yes | 421-a / J-51 tax benefit on the current tax roll |
2 of 3 signals present. Buildings receiving 421-a or J-51 benefits are generally required to register their units as rent-stabilized for the duration of the benefit. The definitive answer for any unit: request its rent history from NYS Homes & Community Renewal (free, at hcr.ny.gov).
| Registered owner(s) | ONE RIVERSIDE PARK CONDOMINIUM |
| Head officer | THERA WILLIAMS |
| Managing agent | HALSTEAD MANAGEMENT CO. |
| Last registered | 2025-08-01 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $770,496 | $346,724 |
| 2026 | $819,575 | $368,809 |
| 2027 | $1,225,051 | $551,273 |
The city's market estimate has risen 59% between tax years 2025 and 2027.
Tax exemptions on the roll: 421A 20 YR NO CAP
For property tax, the Department of Finance values this condo as if it were a rental building. Its 2023 estimate: gross income $29,703,086 a year ($57.27 per sq ft), operating expenses $9,952,894 ($19.19 per sq ft), net operating income $19,750,192. 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 94/100 (2022 disclosure cycle) |
| Heating fuel | NATURALGAS |
| Facade (Local Law 11) | SAFE (cycle 9) |
In the FEMA 1%-annual-chance floodplain (2015 preliminary flood maps) — lenders typically require flood insurance here.
Hurricane evacuation zone 6 of 6 — zone 1 evacuates first.
Not in the city's stormwater (cloudburst) flood maps under any modeled scenario.
No street-flooding or sewer-backup complaints on record at this address.
Sources: FEMA flood maps (coastal), NYC DEP Stormwater Flood Maps (cloudburst), NYC hurricane evacuation zones, and 311 records for this address.
| Subway | 66 St-Lincoln Center — 1 · 0.5 mi straight-line (about a 12-minute walk) · station accessibility: full 59 St-Columbus Circle — 1 A B C D · 0.6 mi straight-line (about a 15-minute walk) · station accessibility: full |
| Bus | Nearest boarding stop: West End Av / W 61 St — M57 · 600 ft |
| Citi Bike | West End Ave & W 60 St · 700 ft · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: The Riverside School for Makers and Artists. 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.
50 Riverside Boulevard
| 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 |
226 311 service requests from this address in the last three years — 7 of them about heat or hot water.
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 HALSTEAD MANAGEMENT CO. — 190 buildings, 17,333 units. Grades across the portfolio: A172 · B10 · C4. See the whole portfolio
showing 60 of 190 buildings
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 2026-09-23 | Mortgage $1,100,000 — from LIN, LIANG H to MERS | $1,100,000 | |
| 2026-08-25 | Deed $2,450,000 — from 1 RIVERSIDE PARK 9H LLC to BENMASSAOUD, LATIFA; SALVATI, MARK | $2,450,000 | |
| 2026-08-25 | Mortgage $1,200,000 — from BENMASSAOUD, LATIFA; SALVATI, MARK to CITIBANK, NA; MERS | $1,200,000 | |
| 2026-08-17 | Sold for $2,450,000 | $2,450,000 | $8,942 |
| 2026-08-03 | Mortgage $4,280,000 — from ALTMANN, ALEXANDER; ALTMANN, JULIA to JPMORGAN CHASE BANK NA | $4,280,000 | |
| 2026-08-03 | Deed $5,350,000 — from YIN, DAN to ALTMANN, ALEXANDER; ALTMANN, JULIA | $5,350,000 | |
| 2026-07-21 | Deed $6,550,000 — from GOLDEN, SCOTT; COHEN, STEPHANIE to 50 RSB #50 LLC | $6,550,000 | |
| 2026-07-21 | Mortgage $5,240,000 — from 50 RSB #50 LLC to MORGAN STANLEY PRIVATE BANK, NATIONAL AS; MERS, INC., AS NOMINEE FOR | $5,240,000 | |
| 2026-07-15 | Sold for $5,350,000 | $5,350,000 | $19,526 |
| 2026-07-06 | Sold for $6,550,000 | $6,550,000 | $23,905 |
| 2026-05-04 | AL&R $25,463,830 — from GEORGETTE REALTY LLC; OAKHURST REALTY LLC; BPAP SAG LLC; BJP RIVERSIDE REALTY LLC; 23D RIV to OBRA REAL ESTATE, LLC | $25,463,830 | |
| 2026-05-04 | AL&R $25,463,830 — from GEORGETTE REALTY LLC; OAKHURST REALTY LLC; BPAP SAG LLC; BJP RIVERSIDE REALTY LLC; 23D RIV to OBRA REAL ESTATE, LLC | $25,463,830 | |
| 2026-05-04 | Agreement $25,463,830 — from 17D REALTY LLC; BPAP SAG LLC; 17A REALTY LLC; 3A OAKHURST REALTY LLC; 23D RIVERSIDE REALTY to OBRA REAL ESTATE, LLC | $25,463,830 | |
| 2026-05-04 | Mortgage $4,263,730 — from 23D RIVERSIDE REALTY LLC; BJP RIVERSIDE REALTY LLC; GEORGETTE REALTY LLC; 17A REALTY LLC; to OBRA REAL ESTATE, LLC | $4,263,730 | |
| 2026-05-04 | Mortgage $4,263,730 — from 23D RIVERSIDE REALTY LLC; BJP RIVERSIDE REALTY LLC; GEORGETTE REALTY LLC; 17A REALTY LLC; to OBRA REAL ESTATE, LLC | $4,263,730 |
| Year | Construction | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|---|
| 2017 | 27 | 8 | 10 | 103 | 12 | 160 |
| 2018 | 24 | 13 | 28 | 68 | 9 | 142 |
| 2019 | 14 | 9 | 33 | 76 | 7 | 139 |
| 2020 | 7 | 0 | 8 | 44 | 4 | 63 |
| 2021 | 15 | 4 | 44 | 95 | 2 | 160 |
| 2022 | 2 | 2 | 34 | 68 | 4 | 110 |
| 2023 | 21 | 4 | 102 | 74 | 4 | 205 |
| 2024 | 27 | 10 | 90 | 54 | 9 | 190 |
| 2025 | 8 | 9 | 95 | 61 | 4 | 177 |
| 2026 | 12 | 6 | 54 | 43 | 2 | 117 |
Every one of the 4,388 recorded events, 2006–2026, is laid out year by year in the full report (print-ready).
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