221 recorded events, 1967–2026, from 15 city data systems. The city's paper trail here is mostly 64 311 service requests, 30 HPD complaints, 28 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 63% 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 8.8. In ZIP 11221, 43% of residential buildings hold an A and 17% 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 — 1 class C (immediately hazardous), 0 class B, 1 class A. Oldest open since 2009-01-07. |
status snapshot refreshed weekly from HPD records
No heat or hot-water complaints in the last three years.
1 bedbug-infested unit(s) reported in filings over the last three years.
16 service requests in the last three years. Most common: Graffiti (5) · Water System (2) · Illegal Parking (2) · Street Condition (2) · Noise (2) · Sewer (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) | SERLIN BUILDING LP |
| Head officer | LINDA VERA |
| Managing agent | DIRECT BUILDING MANAGEMENT |
| Last registered | 2025-09-12 |
as filed by the owner in the building's HPD registration
| Tax year | City market value | Assessed value |
|---|---|---|
| 2025 | $1,417,000 | $637,650 |
| 2026 | $1,134,000 | $510,300 |
| 2027 | $1,121,000 | $504,450 |
The city's market estimate has fallen 21% between tax years 2025 and 2027.
| Heating fuel | NO2FUEL |
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 | Knickerbocker Av — M · 950 ft straight-line (about a 5-minute walk) · station accessibility: none Myrtle-Wyckoff Avs — L M · 0.3 mi straight-line (about a 7-minute walk) · station accessibility: full |
| Bus | Nearest boarding stop: Gates Av / Knickerbocker Av — B52 · 300 ft |
| Citi Bike | Linden St & Knickerbocker Ave · 150 ft · station location as of 2026-09-23; live availability |
| School zones (2024–25 map) | Elementary: P.S. 116 Elizabeth L Farrell Middle: J.H.S. 291 Roland Hayes. 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.
541 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 |
16 311 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 DIRECT BUILDING MANAGEMENT — 87 buildings, 523 units. Grades across the portfolio: A41 · B30 · C5 · D7 · F2. See the whole portfolio
showing 60 of 87 buildings
| Date | Record | Amount | Per res. unit |
|---|---|---|---|
| 2008-12-24 | Mortgage $2,078,713 — from SERLIN BUILDING LIMITED PARTNERSHIP to CITY OF NEWYORK | $2,078,713 | |
| 2008-12-24 | Agreement $14,373,860 — from CITY OF NEWYORK to SERLIN BUILDING LIMITED PARTNERSHIP | $14,373,860 | |
| 2008-12-24 | Deed $11,740,800 — from NEIGHBORHOOD PARTNERSHIP HOUING DEVELOPM to SERLIN BUILDING LIMITED PARTNERSHIP | $11,740,800 | |
| 2005-02-17 | Mortgage $11,194,978 — from NEIGHBORHOOD PARTNERSHIP HDFC, INC.; SERLIN BUILDING MANAGEMENT,INC. to THE BANK OF NEW YORK | $11,194,978 | |
| 2005-02-17 | Mortgage $11,194,978 — from SERLIN BUILDING MANAGEMENT,INC.; NEIGHBORHOOD PARTNERSHIP HDFC, INC. to THE BANK OF NEW YORK | $11,194,978 | |
| 2005-02-17 | Mortgage $1,089,466 — from NEIGHBORHOOD PARTNERSHIP HDFC, INC.; SERLIN BUILDING MANAGEMENT,INC. to THE BANK OF NEW YORK | $1,089,466 | |
| 2005-02-17 | Mortgage $1,089,466 — from NEIGHBORHOOD PARTNERSHIP HDFC, INC.; SERLIN BUILDING MANAGEMENT,INC. to THE BANK OF NEW YORK | $1,089,466 | |
| 2005-02-17 | AL&R $24,568,888 — from THE BANK OF NEW YORK to SERLIN BUILDING MANAGEMENT,INC.; NEIGHBORHOOD PARTNERSHIP HDFC, INC. | $24,568,888 |
| Year | Housing & tenants | Ownership & money | Health & systems | Total |
|---|---|---|---|---|
| 2017 | 3 | 0 | 2 | 5 |
| 2018 | 4 | 1 | 4 | 9 |
| 2019 | 3 | 1 | 4 | 8 |
| 2020 | 4 | 0 | 3 | 7 |
| 2021 | 9 | 0 | 6 | 15 |
| 2022 | 7 | 0 | 9 | 16 |
| 2023 | 7 | 0 | 5 | 12 |
| 2024 | 6 | 0 | 6 | 12 |
| 2025 | 12 | 0 | 4 | 16 |
| 2026 | 3 | 0 | 3 | 6 |
Every one of the 221 recorded events, 1967–2026, is laid out year by year in the full report (print-ready).
Explore: ZIP 11221 · Landlord rankings · How grades work · The map · The Mice Map