312 East 21st Street
Top insights
- More open HPD violations than ~69% of buildings in this ZIP (84 open)
- 29 open hazardous (Class C) violations
- More HPD complaints than the neighborhood average (42 vs ~31)
- Built in 1940
- Rent-stabilized: 54 of 54 units
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
312 East 21st Street
Open in Google Street View ↗
- City records show 84 open HPD violations, 29 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 1989 — why has it stayed open this long, and is it in or near this unit?
- DHCR’s most recent registration lists 54 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: Properly repair or replace the broken or defective glass creating cut hazard at intercom….
- 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.
312 East 21st Street sits in Brooklyn, ZIP 11226. The closest subway is Beverley Rd (Q) (6-minute walk), served by the Q line.
Building Condition
Oldest open violation: August 1989 · Most recent: September 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.
- 2026-09-20 "§ 27-2005 ADM CODE PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE FIRE RETARDANT MATERIAL AT WINDOW RECES…"
- 2026-09-20 "§ 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE GLASS CREATING CUT HAZARD AT INTERCOM SYSTEM AT BUILDI…"
- 2026-09-20 "§ 27-2026, 2027 HMC: PROPERLY REPAIR THE SOURCE AND ABATE THE EVIDENCE OF A WATER LEAK AT WINDOW RECESS AT 1ST WINDOW FR…"
- 2026-09-20 "§ 27-2005 ADM CODE PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE TERRAZZO STOOL AT 2ND WINDOW FROM NORTH…"
- 2026-09-20 "§ 27-2013 ADM CODE PAINT WITH LIGHT COLORED PAINT TO THE SATISFACTION OF THIS DEPARTMENT THE WINDOW RECESS AT 1ST WINDOW…"
- 2026-09-02
- 2026-09-02
- 2026-06-10
- 2026-06-10
- 2025-11-10
- Class C · 29 open · penalty 435 · (15/ea)
- Class B · 43 open · penalty 215 · (5/ea)
- Class A · 12 open · penalty 12 · (1/ea)
- 2026-08-23 · Apt 6J · NON EMERGENCY · UNSANITARY CONDITION
- 2026-08-11 · Apt 4J · NON EMERGENCY · UNSANITARY CONDITION
- 2026-08-02 · Apt 4J · NON EMERGENCY · PAINT/PLASTER
- 2025-01-27
- 2023-07-24
- 2023-10-04 "FAILURE TO CERTIFY CORRECTION ON IMMEDIATELY HAZARDOUS (CLASS 1) ECB VIOLATION"
- 2021-06-02 "FAILURE TO FILE BENCHMARKING REPORT OF ENERGY USE AS PER AD. CODE SEC. 28-309.4"
- 2020-12-09 "FAILURE TO CERTIFY CORRECTION ON IMMEDIATELY HAZARDOUS (CLASS 1) ECB VIOLATION"
3 open lead-paint hazard violations on record (most recent 2025). 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 1940). 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: 129
- PETIT LARCENY: 126
- ASSAULT 3 & RELATED OFFENSES: 92
- VEHICLE AND TRAFFIC LAWS: 62
- DANGEROUS DRUGS: 51
- Noise - Residential: 242
- HEAT/HOT WATER: 213
- UNSANITARY CONDITION: 131
- PAINT/PLASTER: 94
- WATER LEAK: 67
- 1009 FLATBUSH AVENUE
- 1019 FLATBUSH AVE
- 1019 FLATBUSH AVE
- Success Academy Charter School - Flatbush
- P.S. 245
- Norma Adams Clemons Academy
- Academy for College Preparation and Career Explora
- Science, Technology and Research Early College Hig
- Fahari Academy Charter School
- Erasmus Campus - Science/Math
- Erasmus Campus - Humanities
- Erasmus Campus - Business/Tec
- Beverley Rd
- Church Av
- Cortelyou Rd
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Norma Adams Clemons Academy
- Starting Point Serv - St. Marks
- Mivos Quartet Performing Arts, Inc.
- Flatbush African Burial Ground
- High School For Youth And Community Development At Erasmus
- South Wing Theatre Company
Internet providers serving this area
Internet providers available in this area — including fiber:
- Optimum Cable Fiber Up to 8,000 Mbps down · 8,000 Mbps up
- Verizon Fiber Up to 2,300 Mbps down · 2,300 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.
Market & Availability
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