525 East 21st Street
Top insights
- 8 open hazardous (Class C) violations
- Built before 1939 (city records: 1910) — likely subject to NYC lead-paint rules
- Rent-stabilized: 42 of 42 units
About this building
City records list 1910 as the year built — older than 94% of the 492 buildings we cover in ZIP 11226, and the oldest of the 5 buildings we cover on this block. The building’s floor space is 3.6 times the size of its lot: 51,611 sq ft of building on a 14,464 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
525 East 21st Street
Open in Google Street View ↗
- City records show 38 open HPD violations, 8 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 2020 — why has it stayed open this long, and is it in or near this unit?
- DHCR’s most recent registration lists 42 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: Rcny repair, replace or provide an approved and operational carbon monoxide detecting….
- 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.
525 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: August 2020 · 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.
- 2026-09-22 "§ 27-2045(B)(1)(B) HMC, § 12-06, § 12-07, § 12-09 RCNY REPAIR, REPLACE OR PROVIDE AN APPROVED AND OPERATIONAL CARBON MON…"
- 2026-09-22 "§ 27-2005 ADM CODE PROPERLY REPAIR WITH SIMILAR MATERIAL THE BROKEN OR DEFECTIVE WOOD FLOOR IN THE 1st ROOM FROM NORTH A…"
- 2026-09-22 "§ 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR THE CEILING IN THE 2nd…"
- 2026-09-22 "§ 27-2045(B)(1)(A) HMC, § 12-01, § 12-03 RCNY REPAIR, REPLACE OR PROVIDE AN APPROVED AND OPERATIONAL SMOKE DETECTING DEV…"
- 2026-09-22 "§ 27-2026 ADM CODE REPAIR THE LEAKY AND/OR DEFECTIVE WATER SUPPLY PIPE AT UNDER THE SINK IN THE KITCHEN LOCATED AT APT 1…"
- 2026-03-11
- 2026-03-11
- 2024-08-26
- Class C · 8 open · penalty 120 · (15/ea)
- Class B · 26 open · penalty 130 · (5/ea)
- Class A · 4 open · penalty 4 · (1/ea)
- 2026-07-01 · Apt 6B · EMERGENCY · WATER LEAK
- 2026-06-01 · Apt A8 · EMERGENCY · PLUMBING
- 2026-06-01 · Apt A8 · EMERGENCY · DOOR/WINDOW
- 2023-06-30 "VIOLATION ISSUED-FAILURE TO FILE 2020 EXTERNAL LOW PRESSURE INSPECTION"
- 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)"
8 lead-paint hazards cited and later remediated (most recent 2022); no open hazards on record. Remediation addresses the cited conditions, not necessarily every painted surface.
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
- VEHICLE AND TRAFFIC LAWS: 132
- HARRASSMENT 2: 129
- ASSAULT 3 & RELATED OFFENSES: 61
- PETIT LARCENY: 45
- OTHER STATE LAWS: 34
- Noise - Street/Sidewalk: 409
- HEAT/HOT WATER: 199
- Noise - Residential: 187
- Noise - Vehicle: 129
- UNSANITARY CONDITION: 119
- 1155 FLATBUSH AVE
- 871 OCEAN AVE
- 1200 FLATBUSH AVE
- P.S. 245
- P.S. 139 Alexine A. Fenty
- Central Brooklyn Ascend Charter School
- M.S. 246 Walt Whitman
- Fahari Academy Charter School
- Academy for College Preparation and Career Explora
- Fahari Academy Charter School
- Academy for College Preparation and Career Explora
- Science, Technology and Research Early College Hig
- Cortelyou Rd
- Beverley Rd
- 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 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.
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