721 Union Avenue
Class B
Class C
12 months to Aug 2026
rent-stabilized with
DHCR (most recent year)
units (PLUTO)
12 months through March 2026
rent
min walk
(311 complaints)
errands grade
nearby
Top insights
- More open HPD violations than ~67% of buildings in this ZIP (39 open)
- 12 open hazardous (Class C) violations
- More HPD complaints than the neighborhood average (36 vs ~13)
- Built before 1939 (city records: 1920) — likely subject to NYC lead-paint rules
- Rent-stabilized: 48 units registered
About this building
The building’s floor space is 4.6 times the size of its lot: 43,750 sq ft of building on a 9,600 sq ft lot.
Comparisons with neighboring buildings, as of October 21, 2026.
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.
721 Union Avenue
Open in Google Street View ↗
- City records show 39 open HPD violations, 12 immediately hazardous (Class C) under 729 Union Avenue — the address HPD files this building’s records under, not the address on this page. Ask which are still unresolved in the unit and the landlord’s timeline to clear them.
- The oldest open violation on record dates to 2022 — why has it stayed open this long, and is it in or near this unit?
- DHCR’s most recent registration lists 48 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: Trace and repair the source and abate the visible mold condition... greater than 10sq.ft….
- 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.
721 Union Avenue sits in Bronx, ZIP 10455. The closest subway is Prospect Av (2,5) (4-minute walk), served by the 2, 5, and 6 lines.
Building Condition
Oldest open violation: September 2022 · 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.
- 2026-09-23
- 2026-09-23
- 2026-09-23
- 2026-09-23
- 2026-09-18
- 2026-09-18
- 2026-08-10
- 2026-05-27
- 2026-05-27
- 2026-05-27
- Class C · 12 open · penalty 180 · (15/ea)
- Class B · 25 open · penalty 125 · (5/ea)
- Class A · 2 open · penalty 2 · (1/ea)
- 2026-07-21 · Apt B1 · NON EMERGENCY · UNSANITARY CONDITION
- 2026-07-21 · Apt B1 · EMERGENCY · DOOR/WINDOW
- 2026-07-21 · Apt B1 · EMERGENCY · PLUMBING
- 2025-02-24
- 2025-02-24
- 2025-02-24
- 2024-03-25
- 2023-09-26
- 2021-12-01 "FAILURE TO DISPLAY ENERGY EFFICIENCY SCORE AND ENERGY EFFICIENCY GRADE AS PER ADCODE SEC. 28-309.12.3"
- 2015-03-03 "ISSUED FOR FAILURE TO FILE ANNUAL BOILER 2013 INSPECTION REPORT"
- 2014-05-15 "ISSUED FOR FAILURE TO FILE ANNUAL BOILER 2012 INSPECTION REPORT"
16 lead-paint hazards cited and later remediated (most recent 2024); 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 1920). 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: 14 procedural §27-2056 violations (failure to file required lead paperwork, most recent 2023) — a records failure, not evidence of a lead hazard.
The Building
Neighborhood & Environment
~1 block 300m
~2-3 blocks
- HARRASSMENT 2: 111
- ASSAULT 3 & RELATED OFFENSES: 94
- PETIT LARCENY: 93
- FELONY ASSAULT: 56
- GRAND LARCENY: 52
- HEAT/HOT WATER: 150
- Illegal Parking: 87
- UNSANITARY CONDITION: 83
- Noise - Residential: 73
- PAINT/PLASTER: 40
- 809 EAST 156 STREET
- 4632 A 3 AVENUE
- 740 PROSPECT AVENUE
- P.S. X017
- P.S. 130 Abram Stevens Hewitt
- P.S. 161 Juan Ponce De Leon School
- P.S. X017
- South Bronx Academy for Applied Media
- Academy of Public Relations
- P.S. X017
- Prospect Av
- Jackson Av
- E 149 St
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- Grade A
- St Anselm School
- South Bronx School Of Technology
- P.s. 062 Inocensio Casanova
- Jill Chaifetz Transfer High School
- P.s. 157 Grove Hill
- Captain Rivera Playground
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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