723 Knickerbocker Avenue
Class B
Class C
12 months to Aug 2026
rent-stabilized with
DHCR (most recent year)
units (PLUTO)
12 months through June 2026
rent
min walk
(311 complaints)
errands grade
nearby
Top insights
- More open HPD violations than ~80% of buildings in this ZIP (24 open)
- 5 open hazardous (Class C) violations
- Built before 1939 (city records: 1910) — likely subject to NYC lead-paint rules
- Rent-stabilized: 8 of 8 units
About this building
City records list 1910 as the year built — older than 77% of the 1,204 buildings we cover in ZIP 11221, and the newest of the 6 buildings we cover on this block. The building’s floor space is 3.1 times the size of its lot: 7,956 sq ft of building on a 2,550 sq ft lot.
Comparisons with neighboring buildings, as of October 28, 2026.
723 Knickerbocker Avenue
Open in Google Street View ↗
- City records show 24 open HPD violations, 5 immediately hazardous (Class C) at this building. Ask which are still unresolved in the unit and the landlord’s timeline to clear them.
- The oldest open violation on record dates to 2008 — why has it stayed open this long, and is it in or near this unit?
- DHCR’s most recent registration lists 8 rent-stabilized units here. Ask whether this specific unit is one of them, and ask the landlord for its legal regulated rent and lease history.
- Confirm the condition behind the most recent open violation was actually repaired, not just marked closed: File annual bedbug report in accordance with hpd rule as described on the back of this….
- Confirm in person that the immediately-hazardous (Class C) conditions — typically heat, hot water, leaks, mold or pests — are genuinely fixed, not just marked closed.
723 Knickerbocker Avenue sits in Brooklyn, ZIP 11221. The closest subway is Halsey St (L) (6-minute walk), served by the L and M lines.
Building Condition
Oldest open violation: June 2008 · Most recent: May 2026. HPD marks a violation open until it is certified as corrected, so an old date can mean an unresolved condition or a repair that was never certified.
- 2026-05-05
- 2025-06-10
- 2024-06-17
- 2024-06-17
- 2024-06-17
- Class C · 5 open · penalty 75 · (15/ea)
- Class B · 7 open · penalty 35 · (5/ea)
- Class A · 12 open · penalty 12 · (1/ea)
- 2002-03-26
- 1999-03-16
- 1998-05-04
3 open lead-paint hazard violations on record (most recent 2013). These are HPD violations recorded against the building — not a test of any specific apartment.
Under NYC Local Law 1 (Admin Code §27-2056.5), lead paint is presumed present in common areas and in apartments where a child under 6 resides, in multiple dwellings built before 1960 (this building: built 1910). The presumption stands unless the owner obtained a lead-free or lead-safe exemption from HPD. Those exemption records aren’t published as open data, so we can’t confirm one either way.
The Building
Neighborhood & Environment
~1 block 300m
~2-3 blocks
- HARRASSMENT 2: 38
- ASSAULT 3 & RELATED OFFENSES: 38
- PETIT LARCENY: 33
- GRAND LARCENY: 27
- VEHICLE AND TRAFFIC LAWS: 18
- Noise - Residential: 154
- Illegal Parking: 96
- Noise - Street/Sidewalk: 51
- HEAT/HOT WATER: 43
- UNSANITARY CONDITION: 30
- 449 IRVING AVE
- 472 WILSON AVENUE
- 804 KNICKERBOCKER AVENUE
- Bushwick Ascend Charter School
- P.S. 151 Lyndon B. Johnson
- P.S. 106 Edward Everett Hale
- Bushwick Ascend Charter School
- All City Leadership Secondary School
- J.H.S. 291 Roland Hayes
- The Brooklyn School for Math and Research
- Academy for Excellence in Leadership
- The Brooklyn School for Social Justice
- Halsey St
- Myrtle-Wyckoff Avs
- Wilson Av
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Academy For Excellence In Leadership
- Madison Square Garden Association
- The Brooklyn School For Math And Research
- Aim High - New Life Child Devel
- The Brooklyn School For Social Justice
- P.s. 151 Lyndon B. Johnson
Internet providers serving this area
Internet providers available in this area — including fiber:
- Verizon Fiber Up to 2,300 Mbps down · 2,300 Mbps up
- Optimum Cable Up to 940 Mbps down · 35 Mbps up
How to check internet providers before signing an NYC lease →
Source: FCC Broadband Data Collection (NY, rev. May 2026). Wired broadband only — cable + fiber. DSL, satellite, and fixed-wireless not included. Block-level data; actual availability may vary by building.
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