31 East 21st Street
Top insights
- 13 open hazardous (Class C) violations
- More HPD complaints than the neighborhood average (52 vs ~31)
- Built before 1939 (city records: 1931) — likely subject to NYC lead-paint rules
- Rent-stabilized: 49 of 49 units
About this building
The building’s floor space is 4.5 times the size of its lot: 41,000 sq ft of building on a 9,075 sq ft lot.
Comparisons with neighboring buildings, as of October 13, 2026.
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
31 East 21st Street
Open in Google Street View ↗
- City records show 38 open HPD violations, 13 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 2017 — why has it stayed open this long, and is it in or near this unit?
- DHCR’s most recent registration lists 49 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 and abate unsafe electric wiring condition consisting of electrical cord….
- 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.
31 East 21st Street sits in Brooklyn, ZIP 11226. The closest subway is Parkside Av (Q) (3-minute walk), served by the Q line.
Building Condition
Oldest open violation: January 2017 · 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, 2006, 2037 HMC: PROPERLY REPAIR AND ABATE UNSAFE ELECTRIC WIRING CONDITION CONSISTING OF ELECTRICAL CORD AT S…"
- 2026-09-20 "§ 27-2026, 2027 HMC: PROPERLY REPAIR THE SOURCE AND ABATE THE EVIDENCE OF A WATER LEAK AT CEILING IN THE KITCHEN LOCATED…"
- 2026-09-20 "§ 27-2005 ADM CODE PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE CAULK AROUND AT BATHTUB IN THE BATHROOM…"
- 2026-09-20 "§ 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT CEILING AND NORTH W…"
- 2026-09-20 "§27-2104(B) HMC POST A PROPER NOTICE REGARDING RENT STABILIZATION LAW, IN A FORM APPROVED BY THE COMMISSIONER, IN A CONS…"
- 2026-09-20
- 2026-03-17
- Class C · 13 open · penalty 195 · (15/ea)
- Class B · 22 open · penalty 110 · (5/ea)
- Class A · 3 open · penalty 3 · (1/ea)
- 2026-04-08 · Apt BLDG · EMERGENCY · HEAT/HOT WATER
- 2026-04-08 · Apt 2G · EMERGENCY · HEAT/HOT WATER
- 2026-03-29 · Apt 2G · EMERGENCY · HEAT/HOT WATER
- 2025-12-02
- 2025-01-28
- 2024-11-22
- 2024-10-03
- 2021-08-23
- 2020-10-17
- 2020-08-02 "FAILURE TO FILE BENCHMARKING REPORT OF ENERGY USE AS PER AD. CODE SEC. 28-309.4"
1 open lead-paint hazard violation on record (most recent 2017). These are HPD violations recorded against the building — not a test of any specific apartment.
4 earlier hazards cited and remediated.
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 1931). 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: 157
- PETIT LARCENY: 129
- ASSAULT 3 & RELATED OFFENSES: 113
- CRIMINAL MISCHIEF & RELATED OF: 72
- FELONY ASSAULT: 49
- HEAT/HOT WATER: 398
- Noise - Residential: 173
- UNSANITARY CONDITION: 144
- Noise - Street/Sidewalk: 123
- Illegal Parking: 119
- 789 FLATBUSH AVE
- 762 FLATBUSH AVE
- 803 FLATBUSH AVE
- Success Academy Charter School - Flatbush
- P.S. 092 Adrian Hegeman
- Lefferts Gardens Charter School
- Academy for College Preparation and Career Explora
- Science, Technology and Research Early College Hig
- Achievement First Voyager Charter School
- Erasmus Campus - Science/Math
- Erasmus Campus - Humanities
- Erasmus Campus - Business/Tec
- Parkside Av
- Church Av
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Umma Park
- Flatbush Learning Center
- Flatbush Library
- Immigrant Adult Support Center
- Flatbush African Burial Ground
- Duane Joseph Plaza
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 980 Mbps down · 880 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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