520 East 21st Street
Top insights
- More open HPD violations than ~93% of buildings in this ZIP (208 open)
- 69 open hazardous (Class C) violations
- More HPD complaints than the neighborhood average (96 vs ~31)
- Built in 1951 (city records)
- Rent-stabilized: 106 units registered
About this building
City records list 1951 as the year built — newer than 88% of the 492 buildings we cover in ZIP 11226. 102 apartments — the most of any of the 4 buildings we cover on this block, and more than 95% of the 491 residential buildings we cover in ZIP 11226 have fewer. The building’s floor space is 3.8 times the size of its lot: 103,494 sq ft of building on a 27,000 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
A difference between the DHCR rent-stabilized count and the PLUTO total is common and does not, on its own, indicate a violation: units can leave rent stabilization legally, the two datasets count units differently, some units may be non-residential, and a registration can be filed incompletely. To check your own apartment, see how to request your rent history from DHCR.
520 East 21st Street
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- City records show 208 open HPD violations, 69 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 2015 — why has it stayed open this long, and is it in or near this unit?
- DHCR’s most recent registration lists 106 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 the source and abate the evidence of a water leak at ceiling in the kitchen.
- 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.
520 East 21st Street sits in Brooklyn, ZIP 11226. The closest subway is Cortelyou Rd (Q) (6-minute walk), served by the Q line.
Building Condition
Oldest open violation: December 2015 · 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.
- 2026-09-21 "§ 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE SPRING BALANCES AT UPPER SASH WINDOW , 2ND FROM NORTH…"
- 2026-09-21 "566 (B) 27-2021.4 HMC: ABATE THE NUISANCE CONSISTING OF PESTS. EVIDENCE OF FLIES IN THE ENTIRE APARTMENT LOCATED AT APT…"
- 2026-09-21 "§ 27-2026, 2027 HMC: PROPERLY REPAIR THE SOURCE AND ABATE THE EVIDENCE OF A WATER LEAK AT CEILING IN THE KITCHEN LOCATED…"
- 2026-09-21 "§ 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE ELECTRICAL LIGHT SWITCH AT NORTH WALL IN THE 4th ROOM…"
- 2026-09-21 "§ 27-2005 ADM CODE REPLACE WITH NEW THE MISSING WOOD DOOR AT, BASE CABINET UNDERNEATH SINK, NORTH WALL , IN THE KITCHEN…"
- 2026-09-21
- 2026-09-21
- 2026-09-21
- 2026-09-18
- 2026-09-18
- Class C · 69 open · penalty 1035 · (15/ea)
- Class B · 115 open · penalty 575 · (5/ea)
- Class A · 24 open · penalty 24 · (1/ea)
- 2026-08-27 · Apt 1F · NON EMERGENCY · ELECTRIC
- 2026-08-27 · Apt 1F · EMERGENCY · UNSANITARY CONDITION
- 2026-08-27 · Apt 1F · NON EMERGENCY · PAINT/PLASTER
- 2023-06-20 "VIOLATION ISSUED-FAILURE TO FILE 2018 EXTERNAL LOW PRESSURE INSPECTION"
- 2023-04-22 "FAILURE TO SUBMIT AN EER PER AD. CODE SEC. 28-308.4 - MULTIPLE YEARS (2022)"
- 2022-12-01 "FAILURE TO DISPLAY ENERGY EFFICIENCY SCORE AND ENERGY EFFICIENCY GRADE AS PER ADCODE SEC. 28-309.12.3"
10 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.
25 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 1951). 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.
Also on record: 2 procedural §27-2056 violations (failure to file required lead paperwork, most recent 2026) — a records failure, not evidence of a lead hazard.
The Building
Neighborhood & Environment
~1 block 300m
~2-3 blocks
- HARRASSMENT 2: 115
- VEHICLE AND TRAFFIC LAWS: 106
- ASSAULT 3 & RELATED OFFENSES: 59
- PETIT LARCENY: 45
- OTHER STATE LAWS: 32
- Noise - Street/Sidewalk: 402
- HEAT/HOT WATER: 273
- Noise - Residential: 192
- UNSANITARY CONDITION: 151
- Noise - Vehicle: 129
- 871 OCEAN AVE
- 1155 FLATBUSH AVE
- 1133 FLATBUSH AVE
- P.S. 245
- P.S. 139 Alexine A. Fenty
- Success Academy Charter School - Flatbush
- M.S. 246 Walt Whitman
- Fahari Academy Charter School
- Academy for College Preparation and Career Explora
- Fahari Academy Charter School
- Erasmus Campus - Science/Math
- Erasmus Campus - Humanities
- Cortelyou Rd
- Beverley Rd
- Newkirk Plaza
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Caribbeing
- Starting Point Serv - St. Marks
- New Generation Elementary School
- P.s. 245
- Global Health Care Training Centre,i
- Sweet Serenity Success, Inc.
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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