1,557 recorded events, 1971–2026, from 16 city data systems. The city's paper trail here is mostly 737 HPD complaints, 411 311 service requests, 205 HPD housing violations.
Full record, year by year Support this site
A modest record — below the level that usually signals systemic problems. More recorded distress than 84% 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 116.3. In ZIP 11237, 39% of residential buildings hold an A and 15% 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 | 44 total — 16 class C (immediately hazardous), 28 class B, 0 class A. Oldest open since 2008-08-17. |
status snapshot refreshed weekly from HPD records
2 heat or hot-water complaints in the last three years (winter 2024–25: 2).
No bedbug-infested units reported in the last three years of filings.
$3,125 in enforcement penalties imposed (ECB/OATH) in the last three years.
33 service requests in the last three years. Most common: Noise (17) · WATER LEAK (4) · ELECTRIC (3) · UNSANITARY CONDITION (3) · PLUMBING (2) · Food Establishment (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 (1931) |
| Yes | Six or more residential units (6) |
| 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) | 223 KNICKERBOCKER LLC |
| Head officer | ERIC MANN |
| Managing agent | L ROSE REALTY, INC |
| Last registered | 2025-08-04 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $902,000 | $405,900 |
| 2026 | $1,009,000 | $454,050 |
| 2027 | $1,176,000 | $529,200 |
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.
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 | Jefferson St — L · 0.3 mi straight-line (about a 7-minute walk) · station accessibility: none |
| Bus | Nearest boarding stop: Wilson Av / Troutman St — B60 · 750 ft |
| Citi Bike | Suydam St & Knickerbocker Ave · 700 ft · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: P.S. 123 Suydam Middle: J.H.S. 162 The Willoughby. 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.
223 Knickerbocker 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 |
| Anything else | Anything else |
33 311 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 L ROSE REALTY, INC — 28 buildings, 272 units. Grades across the portfolio: A12 · B8 · C5 · D3. See the whole portfolio
| Building | Borough | Units | Grade |
|---|---|---|---|
| 1007 Atlantic Avenue | BK | 50 | A |
| 109 Gold Street | BK | 33 | A |
| 820 Franklin Avenue | BK | 32 | A |
| 169 North 10 Street | BK | 20 | A |
| 209 West 20 Street | MN | 12 | A |
| 583 Lorimer Street | BK | 10 | A |
| 359 Lewis Avenue | BK | 8 | C |
| 320 Cumberland Street | BK | 7 | A |
| 259 St Nicholas Avenue | BK | 7 | B |
| 266 3 Avenue | MN | 7 | A |
| 377 Menahan Street | BK | 6 | B |
| 152 Norman Avenue | BK | 6 | A |
| 379 Menahan Street | BK | 6 | A |
| 2041 Palmetto Street | QN | 6 | A |
| 315 Melrose Street | BK | 6 | B |
| 155 Evergreen Avenue | BK | 6 | B |
| 223 Knickerbocker Avenue | BK | 6 | B |
| 93 Bainbridge Street | BK | 6 | A |
| 126 Bedford Avenue | BK | 5 | C |
| 240 St Nicholas Avenue | BK | 5 | D |
| 330 Rodney Street | BK | 4 | B |
| 787 Franklin Avenue | BK | 4 | C |
| 176 Delancey Street | MN | 4 | B |
| 215 Knickerbocker Avenue | BK | 4 | D |
| 211 Knickerbocker Avenue | BK | 4 | B |
| 1452 Fulton Street | BK | 3 | C |
| 1450 Fulton Street | BK | 3 | D |
| 597 Manhattan Avenue | BK | 2 | C |
Most recent mortgage recorded against this lot: $370,516 on 2018-07-09 (lender: New York Commercial 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 |
|---|---|---|---|
| 2018-11-29 | AL&R $1,450,000 — from 223 KNICKERBOCKER LLC to NEW YORK COMMERCIAL BANK | $1,450,000 | |
| 2018-08-24 | Agreement $1,450,000 — from 223 KNICKERBOCKER LLC to NEW YORK COMMERCIAL BANK | $1,450,000 | |
| 2018-07-09 | Mortgage $370,516 — from 223 KNICKERBOCKER LLC to NEW YORK COMMERCIAL BANK | $370,517 | |
| 2014-11-13 | AL&R $1,162,500 — from 223 KNICKERBOCKER LLC to THE BRIDGEHAMPTON NATIONAL BANK | $1,162,500 | |
| 2014-11-13 | Mortgage $1,162,500 — from 223 KNICKERBOCKER LLC to THE BRIDGEHAMPTON NATIONAL BANK | $1,162,500 | |
| 2014-11-13 | Deed $1,550,000 — from BUSHWICK CAPITAL & MANAGEMENT LLC to 223 KNICKERBOCKER LLC | $1,550,000 | |
| 2014-02-03 | Mortgage $500,000 — from BUSHWICK CAPITAL & MANAGEMENT LLC; AVENUE L REALTY LLC to SUTTON, DAVID | $500,000 | |
| 2014-02-03 | AL&R $500,000 — from BUSHWICK CAPITAL & MANAGEMENT LLC to SUTTON, DAVID | $500,000 | |
| 2013-01-11 | AL&R $360,000 — from BUSHWICK CAPITAL AND MANAGEMENT LLC to DANGOR, RONI | $360,000 | |
| 2013-01-11 | Mortgage $50,000 — from BUSHWICK CAPITAL & MANAGEMENT LLC to DANGOR, RONI | $50,000 | |
| 2013-01-11 | Agreement $360,000 — from BUSHWICK CAPITAL AND MANAGEMENT LLC to DANGOR, RONI | $360,000 | |
| 2007-03-21 | Mortgage $408,171 — from AVENUE L REALTY LLC to BANK OF SMITHTOWN | $408,171 | |
| 2007-03-21 | Agreement $600,000 — from BANK OF SMITHTOWN to AVENUE L REALTY LLC | $600,000 | |
| 2004-09-17 | Mortgage $30,000 — from AVENUE L REALTY, LLC to NEW YORK COMMUNITY BANK | $30,000 | |
| 2004-09-17 | Agreement $200,000 — from NEW YORK COMMUNITY BANK to AVENUE L REALTY, LLC | $200,000 |
| Year | Enforcement | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|---|
| 2017 | 1 | 33 | 0 | 2 | 36 |
| 2018 | 0 | 73 | 6 | 3 | 82 |
| 2019 | 2 | 82 | 0 | 3 | 87 |
| 2020 | 2 | 37 | 0 | 2 | 41 |
| 2021 | 0 | 94 | 0 | 2 | 96 |
| 2022 | 1 | 10 | 0 | 2 | 13 |
| 2023 | 5 | 45 | 0 | 7 | 57 |
| 2024 | 1 | 37 | 0 | 2 | 40 |
| 2025 | 2 | 9 | 0 | 2 | 13 |
| 2026 | 0 | 50 | 0 | 1 | 51 |
Every one of the 1,557 recorded events, 1971–2026, is laid out year by year in the full report (print-ready).
Explore: ZIP 11237 · Landlord rankings · How grades work · The map · The Mice Map