3921 5th Avenue
Top insights
- 10 open hazardous (Class C) violations
- Built before 1939 (city records: 1925) — likely subject to NYC lead-paint rules
- Rent-stabilized: 5 of 10 units
About this building
10 apartments — the most of any of the 4 buildings we cover on this block. The building’s floor space is 3.5 times the size of its lot: 8,760 sq ft of building on a 2,517 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.
3921 5th Avenue
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- City records show 68 open HPD violations, 10 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 5 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: Remove all encumbrances consisting of freezer and household items at public hall.
- 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.
3921 5th Avenue sits in Brooklyn, ZIP 11232. The closest subway is 36 St (D,N,R) (6-minute walk), served by the D, N, and R lines.
Building Condition
Oldest open violation: October 2015 · Most recent: April 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.
- 2026-04-30 "(A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR…"
- 2025-07-10 "§ 27-2005, 2007 ADM CODE REMOVE ALL ENCUMBRANCES CONSISTING OF FREEZER AND HOUSEHOLD ITEMS AT PUBLIC HALL, 1st STORY"
- 2025-06-05 "(A) § HMC:FILE ANNUAL BEDBUG REPORT IN ACCORDANCE WITH HPD RULE AS DESCRIBED ON THE BACK OF THIS NOTICE OF VIOLATION OR…"
- 2024-07-17 "§ 27-2005 ADM CODE REPAIR THE BROKEN OR DEFECTIVE PLASTERED SURFACES AND PAINT IN A UNIFORM COLOR AT WINDOW RECESS AT NO…"
- 2024-07-17 "§ 27-2005 HMC: PROPERLY REPAIR OR REPLACE THE BROKEN OR DEFECTIVE COUNTER BALANCE AT LOWER SASH WINDOW IN THE BATHROOM L…"
- 2024-07-17
- Class C · 10 open · penalty 150 · (15/ea)
- Class B · 39 open · penalty 195 · (5/ea)
- Class A · 19 open · penalty 19 · (1/ea)
- 2009-01-01
- 2008-01-03
- 2007-01-19
2 lead-paint hazards cited and later remediated (most recent 2008); 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 1925). 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
- ASSAULT 3 & RELATED OFFENSES: 37
- HARRASSMENT 2: 33
- PETIT LARCENY: 17
- CRIMINAL MISCHIEF & RELATED OF: 13
- MISCELLANEOUS PENAL LAW: 11
- Noise - Residential: 123
- Noise - Commercial: 110
- UNSANITARY CONDITION: 73
- Noise - Street/Sidewalk: 63
- Street Condition: 51
- 3901 5TH AVE
- 507 39 STREET
- 544 39TH ST
- P.S. 024
- Sunset Park Avenues Elementary School
- P.S. 169 Sunset Park
- I.S. 136 Charles O. Dewey
- Sunset Park Prep
- P.S. 371 - Lillian L. Rashkis
- Sunset Park High School
- 36 St
- 45 St
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Sunset Park Avenues Elementary School
- Sunset Park Prep
- Artopolis Development
- Blessing Medical Training Institute
- Sunset Park
- I.s. 136 Charles O. Dewey
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
- Spectrum Cable Fiber Up to 1,000 Mbps down · 1,000 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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