268 recorded events, 1900–2026, from 16 city data systems. The city's paper trail here is mostly 86 311 service requests, 64 ACRIS deeds & mortgages, 24 rodent inspections.
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 71% 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 5.7. In ZIP 10036, 62% 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 | 2 total — 0 class C (immediately hazardous), 2 class B, 0 class A. Oldest open since 2012-05-17. |
status snapshot refreshed weekly from HPD records
No heat or hot-water complaints in the last three years.
2 bedbug-infested unit(s) reported in filings over the last three years.
17 service requests in the last three years. Most common: Missed Collection (10) · Encampment (2) · Animal (1) · Rodent (1) · Dirty Condition (1) · Illegal Tree Damage (1).
$246,680 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 (1900) |
| Yes | Six or more residential units (15) |
| Yes | 421-a / J-51 tax benefit on the current tax roll |
3 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) | AMETHYST WEST HDFC |
| Head officer | RALPH WESTERHOFF |
| Managing agent | BRICKWORK MANAGEMENT INC. |
| Last registered | 2025-09-10 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $1,609,000 | $724,050 |
| 2026 | $1,711,000 | $769,950 |
| 2027 | $1,931,000 | $868,950 |
The city's market estimate has risen 20% between tax years 2025 and 2027.
Tax exemptions on the roll: J51
For property tax, the Department of Finance values this co-op as if it were a rental building. Its 2021 estimate: gross income $342,057 a year ($37.63 per sq ft), operating expenses $135,077 ($14.86 per sq ft), net operating income $206,979. These are the city's estimates from comparable rentals, not the building's actual budget, rents or maintenance charges.
| Heating fuel | NO2FUEL |
| Restaurant | Cuisine | Grade | Notes |
|---|---|---|---|
| Marco Vacchi | Not yet graded | — |
Report to 311: Food poisoning · Food safety complaint
1 restaurant · 0 with mice evidence · See them on the Mice Map
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.
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 | Times Sq-42 St — 1 2 3 7 A C E N Q R S W · 800 ft straight-line (about a 4-minute walk) · station accessibility: full |
| Bus | Nearest boarding stop: 9 Av / W 46 St — M11 · 150 ft |
| Citi Bike | W 44 St & 9 Ave · 350 ft · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: P.S. 051 Elias Howe Middle: M.S. 297. 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.
646 9 Avenue
| 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 |
| Food poisoning | Food poisoning |
| Food safety complaint | Food safety complaint |
| Anything else | Anything else |
17 311 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 BRICKWORK MANAGEMENT INC. — 58 buildings, 707 units. Grades across the portfolio: A46 · B9 · C2. See the whole portfolio
Most recent mortgage recorded against this lot: $50,396 on 2004-02-03 (lender: Jp Morgan Chase 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 |
|---|---|---|---|
| 2026-09-23 | RPTT&RET $500,000 — from YU, XIAOQI to CHANG, JONATHAN | $500,000 | |
| 2026-07-14 | Sold for $500,000 | $500,000 | $33,333 |
| 2026-06-08 | RPTT $251,132 — from ESTATE OF RICHARD MENEELY to AMETHYST WEST HDFC | $251,133 | |
| 2026-05-21 | Sold for $251,133 | $251,133 | $16,742 |
| 2023-10-19 | RPTT&RET $435,000 — from WONG, MYRA to BAYRAKDARIAN, KARINA | $435,000 | |
| 2023-10-03 | Sold for $435,000 | $435,000 | $29,000 |
| 2023-01-18 | RPTT&RET $785,000 — from CENTOLA, TANIA R to MOSQUEDA, ELAINE | $785,000 | |
| 2023-01-13 | Sold for $785,000 | $785,000 | $52,333 |
| 2020-05-06 | RPTT&RET $405,000 — from CARNEGIE, BENJAMIN to O'CONNOR, SHEILA | $405,000 | |
| 2020-04-22 | Sold for $405,000 | $405,000 | $27,000 |
| 2018-09-27 | RPTT&RET $590,000 — from HILLEGASS, ERIC to MOORE, CONNOR | $590,000 | |
| 2018-09-18 | Sold for $590,000 | $590,000 | $39,333 |
| 2017-09-29 | RPTT&RET $201,000 — from BLACK HARBOR CAPITAL LLC to CARNEGIE, BENJAMIN | $201,000 | |
| 2017-09-26 | Sold for $201,000 | $201,000 | $13,400 |
| 2016-06-27 | RPTT&RET $367,500 — from ESTATE OF ROLANDO M. HERRERA; GLADYS CESPEDES AS ADMINISTRATOR to YU, XIAOQI | $367,500 |
| Year | Construction | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|---|
| 2017 | 0 | 4 | 6 | 3 | 6 | 19 |
| 2018 | 8 | 0 | 2 | 2 | 2 | 14 |
| 2019 | 0 | 0 | 2 | 1 | 2 | 5 |
| 2020 | 0 | 1 | 23 | 2 | 1 | 27 |
| 2021 | 0 | 0 | 3 | 0 | 2 | 5 |
| 2022 | 0 | 0 | 6 | 0 | 4 | 10 |
| 2023 | 0 | 4 | 7 | 4 | 2 | 17 |
| 2024 | 0 | 0 | 4 | 0 | 3 | 7 |
| 2025 | 0 | 0 | 9 | 0 | 2 | 11 |
| 2026 | 0 | 1 | 9 | 5 | 3 | 18 |
Every one of the 268 recorded events, 1900–2026, is laid out year by year in the full report (print-ready).
Explore: ZIP 10036 · Landlord rankings · How grades work · The map · The Mice Map