540 recorded events, 1978–2026, from 15 city data systems. The city's paper trail here is mostly 165 HPD housing violations, 148 311 service requests, 82 HPD complaints.
Full record, year by year Support this site
A sustained record of distress well beyond its peers. More recorded distress than 98% of 6-24-unit residential buildings citywide. The citywide median for 6-24-unit residential buildings is 16.3 penalty points per 10 units; this building carries 607.9. In ZIP 11220, 69% of residential buildings hold an A and 6% grade D or F. How grades work
Among 46,798 6-24-unit residential buildings citywide · left is less recorded distress, right is more
| Open HPD violations | 117 total — 31 class C (immediately hazardous), 62 class B, 24 class A. Oldest open since 2003-02-09. |
| Active vacate order | 10 unit(s) under an unrescinded HPD vacate order |
status snapshot refreshed weekly from HPD records
2 heat or hot-water complaints in the last three years (winter 2023–24: 2).
No bedbug-infested units reported in the last three years of filings.
$18,750 in enforcement penalties imposed (ECB/OATH) in the last three years.
34 service requests in the last three years. Most common: UNSANITARY CONDITION (7) · Dirty Condition (7) · DOOR/WINDOW (3) · WATER LEAK (3) · Graffiti (2) · ELECTRIC (2).
$343,950 in permitted construction work filed since 2016 (5 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 (1905) |
| Yes | Six or more residential units (8) |
| 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) | X. D. YANG & SON LLC |
| Head officer | DA D YANG |
| Managing agent | OMG MGMT INC |
| Last registered | 2025-09-26 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $1,471,000 | $661,950 |
| 2026 | $1,642,000 | $738,900 |
| 2027 | $1,915,000 | $861,750 |
The city's market estimate has risen 30% between tax years 2025 and 2027.
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.
2 street-flooding or sewer-backup complaints at this address since 2016 (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 | 45 St — R · 0.2 mi straight-line (about a 6-minute walk) · station accessibility: none |
| Bus | Nearest boarding stop: 5 Av / 48 St — B63 · 150 ft |
| Citi Bike | 48 St & 5 Ave · 200 ft · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: P.S. 094 The Henry Longfellow. 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.
512 48 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 |
34 311 service requests from this address in the last three years — 1 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 OMG MGMT INC — 8 buildings, 44 units. Grades across the portfolio: C1 · D6 · F1. See the whole portfolio
| Building | Borough | Units | Grade |
|---|---|---|---|
| 4623 6 Avenue | BK | 10 | D |
| 512 48 Street | BK | 8 | D |
| 4228 5 Avenue | BK | 6 | D |
| 8010 18 Avenue | BK | 5 | F |
| 772 44 Street | BK | 5 | D |
| 6114 4 Avenue | BK | 4 | D |
| 472 42 Street | BK | 3 | D |
| 1518 70 Street | BK | 3 | C |
Most recent mortgage recorded against this lot: $650,000 on 2022-08-19 (lender: Cathay 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 |
|---|---|---|---|
| 2022-08-19 | Mortgage $650,000 — from X.D. YANG & SON LLC to CATHAY BANK | $650,000 | |
| 2022-08-19 | AL&R $650,000 — from X.D. YANG & SON LLC to CATHAY BANK | $650,000 | |
| 2016-12-05 | Agreement $1,050,000 — from X.D. YANG & SON LLC to CATHAY BANK | $1,050,000 | |
| 2016-12-05 | AL&R $1,050,000 — from X.D. YANG & SON LLC to CATHAY BANK | $1,050,000 | |
| 2016-12-05 | Mortgage $313,772 — from X.D. YANG & SON LLC to CATHAY BANK | $313,772 | |
| 2013-09-03 | AL&R $780,000 — from X.D. YANG & SON, LLC to CHINATOWN FEDERAL SAVINGS BANK | $780,000 | |
| 2013-09-03 | Deed $1,090,000 — from 512 48TH ST REALTY INC to X.D. YANG & SON, LLC | $1,090,000 | |
| 2013-09-03 | Mortgage $780,000 — from X.D. YANG & SON, LLC to CHINATOWN FEDERAL SAVINGS BANK | $780,000 | |
| 2008-12-04 | AL&R $525,000 — from 512 48TH ST REALTY INC. to CAPITAL ONE, N.A. | $525,000 | |
| 2008-12-04 | Deed $855,000 — from THEURER BROTHERS REALTY LLC to 512 48TH ST REALTY INC. | $855,000 | |
| 2008-12-04 | Mortgage $525,000 — from 512 48TH ST REALTY, INC. to CAPITAL ONE, N.A. | $525,000 | |
| 2004-03-24 | Deed $275,000 — from 512 ASSOCIATES INC. to THEURER BROTHERS REALTY LLC | $275,000 | |
| 1999-01-08 | Mortgage $80,717 — from 512 ASSOCIATES, INC. to FLUSHING SAVINGS BANK, FSB | $80,717 | |
| 1994-02-22 | Mortgage $21,126 — from 512 ASSOCIATES INC to GREEN POINT SAVINGSBANK | $21,126 | |
| 1986-12-31 | Mortgage $25,000 — from 512 ASSOCIATES INC to CARRION, APOLONIA | $25,000 |
| Year | Construction | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|---|
| 2017 | 4 | 14 | 54 | 0 | 0 | 72 |
| 2018 | 0 | 6 | 2 | 0 | 3 | 11 |
| 2019 | 6 | 2 | 12 | 0 | 0 | 20 |
| 2020 | 0 | 0 | 10 | 1 | 0 | 11 |
| 2021 | 0 | 0 | 14 | 0 | 0 | 14 |
| 2022 | 0 | 0 | 18 | 2 | 3 | 23 |
| 2023 | 0 | 5 | 21 | 0 | 1 | 27 |
| 2024 | 0 | 0 | 37 | 0 | 1 | 38 |
| 2025 | 0 | 3 | 73 | 0 | 3 | 79 |
| 2026 | 2 | 16 | 20 | 0 | 0 | 38 |
Every one of the 540 recorded events, 1978–2026, is laid out year by year in the full report (print-ready).
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