321 Union Street
Brooklyn, NY 11231BBL 3-00428-7503Map
Owner of record: Unavailable Owner
321 Union Street is a condominium in Brooklyn, 11231. It has 7 residential units across 4 floors. The owner of record is Unavailable Owner. HPD has recorded 1 housing violation here, most recently on November 30, 2017.
- HPD violations
- 1
- DOB violations
- 2
- ECB violations
- 3
- HPD complaints
- 0
What to know
No open immediately-hazardous violations among recent records.
Date of the most recent HPD inspection that found a problem.
No balance due on recent ECB violations.
Rent stabilization
No rent-stabilized units in 2018–2024 tax bills
Violations
Most recent first. Showing up to 50 per agency.
HPD housing violations · 1
- IInformation / order
And is therefore subject to civil penalties, prohibited from certifying violations, and denied the right to recover possession of premises for nonpayment of rent until a valid registration statement is filed.
Nov 30, 2017
Closed — Violation dismissed
DOB building violations · 2
- Boilers boiler required
Ll6291-local law 62/91 - boilers boiler required
Jan 1, 2009
Dob violation - dismissed - Boilers boiler required
Ll6291-local law 62/91 - boilers boiler required
Jan 1, 2009
Dob violation - dismissed
ECB violations · 3
- Hazardous
Plumbing work without a permit. noted at time of inspection an alt work in progess pipes and plumbing fixtures have been demolished no permit for the plubming work was issued.remedy:stop all work,provide
Dec 7, 2006 · Penalty $800
Resolve - Hazardous
Failure to carry out demolition operations in a safe & proper manner. noted at time of inspection an active job site men demolishing wood joists, interior walls floor etc the entire 2nd floor has been demolis
Dec 7, 2006 · Penalty $2,000
Resolve - Hazardous
Failure to safeguard public and property noted at time of inspection an active job site. men working at rear of property excavating and setting forms for foundation. site was not provided with an 8' fence
Dec 7, 2006 · Penalty $1,000
Resolve
Complaints
No HPD complaints in our records
Sales history
No recorded sales in our data
Building details
- Building type
- Condominium (R1)
- Year built
- —
- Floors
- 4
- Residential units
- 7
- Building area
- 8,934 ft²
- Lot area
- 4,067 ft²
- Zoning
- R6B
- Community board
- 306
- Council district
- 39
- Block / lot
- 428 / 7503
- Assessed value
- $2,323,801
- Landmark / historic district
- No
HPD registration #312880, last renewed Sep 12, 2025.
Questions about 321 Union Street
Who owns 321 Union Street?
The owner of record in NYC Department of City Planning PLUTO data is Unavailable Owner.
Does 321 Union Street have violations?
Yes. NYC HPD has recorded 1 housing violations at this property.
Is 321 Union Street rent stabilized?
No rent-stabilized units appear in its 2018–2024 tax bills. Individual apartments can still be regulated, so request the rent history from NYS Homes and Community Renewal if unsure.
How many apartments are in 321 Union Street?
It has 7 residential units.
Source: NYC Open Data (DCP PLUTO, HPD, DOB, ECB/OATH, DOF). Records can lag the city's systems. Data refreshed weekly.