82 recorded events, 1970–2026, from 9 city data systems. The city's paper trail here is mostly 20 ACRIS deeds & mortgages, 14 311 service requests, 13 DOB permits.
Full record, year by year Support this site
A modest record — below the level that usually signals systemic problems. More recorded distress than 82% of 1-5-unit residential buildings citywide. The citywide median for 1-5-unit residential buildings is 0 penalty points per 10 units; this building carries 10. In ZIP 10011, 68% of residential buildings hold an A and 5% grade D or F. How grades work
Among 699,345 1-5-unit residential buildings citywide · left is less recorded distress, right is more
No current HPD flags in the latest weekly snapshot: no open violations, no pending litigation, no active vacate orders, and not in the Alternative Enforcement Program.
No heat or hot-water complaints in the last three years.
No bedbug-infested units reported in the last three years of filings.
2 service requests in the last three years. Most common: Abandoned Vehicle (1) · Panhandling (1).
No permitted work with a declared cost filed in the last decade. Permit costs cover filed construction work only — they do not capture routine maintenance or repairs done without a permit.
| Yes | Built before 1974 (1853) |
| No | Six or more residential units (5) |
| No | 421-a / J-51 tax benefit on the current tax roll |
1 of 3 signals present. Only a partial profile — stabilization is possible but less likely. The definitive answer for any unit: request its rent history from NYS Homes & Community Renewal (free, at hcr.ny.gov).
| Registered owner(s) | CHELSEA SQUARE NORTH, INC. |
| Head officer | RALPH WESTERHOFF |
| Managing agent | BRICKWORK MANAGEMENT INC. |
| Last registered | 2025-09-09 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $3,373,000 | $1,517,850 |
| 2026 | $2,704,000 | $1,216,800 |
| 2027 | $2,570,000 | $1,156,500 |
The city's market estimate has fallen 24% between tax years 2025 and 2027.
Tax exemptions on the roll: COLD WAR VETERAN - DISABILITY
Not in the FEMA 1%-annual-chance floodplain (2015 preliminary maps).
Hurricane evacuation zone 2 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 | 23 St — C E · 0.2 mi straight-line (about a 5-minute walk) · station accessibility: none 14 St — A C E L · 0.3 mi straight-line (about an 8-minute walk) · station accessibility: full |
| Bus | Nearest boarding stop: 9 Av / W 23 St — M11 · 400 ft |
| Citi Bike | 9 Ave & W 22 St · 200 ft · station location as of 2026-09-23; live availability |
| Bike facility | Painted bike lane mapped within 75 ft |
| School zones (2024–25 map) | Elementary: P.S. 011: The Sarah J. Garnet Elementary School 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.
409 West 21 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 |
2 311 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: $310,000 on 2007-06-15 (lender: National Consumer Cooperative Bank and Ncb), covering 2 lots — the amount covers all of them. Face amount at recording — it may have since been paid down, refinanced or satisfied. View the recorded document.
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 2025-12-08 | RPTT&RET $1,520,000 — from ALEXANDRA SCOTT ELIZABETH OWENS, ADMINIS; ESTATE OF ROBERT SPENCER TRENTLYON to REED, JOHN C; MISHIMA, HIROYUKI | $1,520,000 | |
| 2025-12-02 | Sold for $1,520,000 | $1,520,000 | $304,000 |
| 2017-08-09 | RPTT&RET $1,587,500 — from CEGLIA MANFREDI, MARIA ENRICA to MULLIGAN, JEFFREY H | $1,587,500 | |
| 2017-07-31 | Sold for $1,587,500 | $1,587,500 | $317,500 |
| 2016-07-22 | RPTT&RET $1,450,000 — from BROLIN, GRANIA to KITMAN, TAYA | $1,450,000 | |
| 2016-05-31 | Sold for $1,450,000 | $1,450,000 | $290,000 |
| 2012-06-21 | RPTT&RET $1,100,000 — from RAHIMIAN, JOSEPH to MANFREDI, MARIA ENRICA CEGLIA | $1,100,000 | |
| 2010-11-05 | RPTT $1,625,000 — from DAVID S. GIBBONS, AS TRUSTEE; AMENDED AND RESTATED MARY WEITZEL GIBBON to SAVAGE, COLIN | $1,625,000 | |
| 2007-09-06 | RPTT&RET $999,000 — from ALECCI, ALLESANDRA to ANSARGE, VERONIQUE; ANSARGE, MARK | $999,000 | |
| 2007-07-17 | RPTT&RET $952,000 — from JULKOWSKI, JEFFREY; RIEDER, KILLIAN to RAHIMIAN, JOSEPH | $952,000 | |
| 2007-06-15 | AL&R $310,000 — from CHELSEA SQUARE NORTH, INC. to NCB; NATIONAL CONSUMER COOPERATIVE BANK | $310,000 | |
| 2007-06-15 | Mortgage $310,000 — from CHELSEA SQUARE NORTH, INC. to NATIONAL CONSUMER COOPERATIVE BANK; NCB | $310,000 |
| Year | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|
| 2017 | 0 | 4 | 2 | 6 |
| 2018 | 1 | 0 | 1 | 2 |
| 2019 | 1 | 0 | 1 | 2 |
| 2020 | 0 | 0 | 0 | 0 |
| 2021 | 3 | 0 | 0 | 3 |
| 2022 | 4 | 0 | 0 | 4 |
| 2023 | 6 | 0 | 0 | 6 |
| 2024 | 3 | 0 | 1 | 4 |
| 2025 | 4 | 2 | 0 | 6 |
| 2026 | 0 | 0 | 1 | 1 |
Every one of the 82 recorded events, 1970–2026, is laid out year by year in the full report (print-ready).
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