306 Union Avenue, Brooklyn

    City inspectors were last at this 21-unit walk-up apartment building on June 4, 2026, and the resulting violation remains open.

    306 Union Avenue is a 21-unit building in Brooklyn, New York City (BBL 3027910001). This building is associated with Brooklyn Neighborhood Housing Development Fund. Brix tracks 6 open HPD violations for this property, along with inspection history, DOB filings, tenant complaints, and rent stabilization status.

    Built in 1920, this walk-up apartment building sits in Brooklyn and is tracked by Brix using public NYC records from HPD, DOB, ACRIS, and 311.

    Tenants have filed 89 HPD complaints about this building over the last five years, most often about heat/hot water.

    What tenants have called the city about here over the last five years:

    The most recent complaint on this building was filed July 12, 2026.

    Conditions cited on open violations at this address:

    The building last changed hands on May 7, 2009, according to recorded deeds.

    Brix score: 14/100. View the Building Report on Brix.

    See every NYC building owned by Brooklyn Neighborhood Housing Development Fund on the landlord portfolio page.

    Part of Williamsburg — see violations, complaints, and landlord activity across the whole neighborhood.

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    Apartments at 306 Union Avenue

    • Unit 6A

      Unit 6A at 306 Union Avenue has 3 open violations.

    • Unit 3A

      Unit 3A at 306 Union Avenue has 2 open violations.

    • Unit 3D

      Unit 3D at 306 Union Avenue has 1 open violation.

    • Unit 30

      Unit 30 at 306 Union Avenue has no violations, last sold in 2007 for $1.3M.

    • Unit 6C

      Unit 6C at 306 Union Avenue has no open violations (4 past violations).

    • Unit 6D

      Unit 6D at 306 Union Avenue has no open violations (13 past violations).

    • Unit 5B

      Unit 5B at 306 Union Avenue has no open violations (2 past violations).

    • Unit 5C

      Unit 5C at 306 Union Avenue has no open violations (5 past violations).

    • Unit 5D

      Unit 5D at 306 Union Avenue has no open violations (1 past violation).

    • Unit 4B

      Unit 4B at 306 Union Avenue has no open violations (1 past violation).

    • Unit 4D

      Unit 4D at 306 Union Avenue has no open violations (1 past violation).

    • Unit 3B

      Unit 3B at 306 Union Avenue has no open violations (3 past violations).

    • Unit 3C

      Unit 3C at 306 Union Avenue has no open violations (1 past violation).

    • Unit 2A

      Unit 2A at 306 Union Avenue has no open violations (6 past violations).

    • Unit 2B

      Unit 2B at 306 Union Avenue has no open violations (1 past violation).

    • Unit 2C

      Unit 2C at 306 Union Avenue has no open violations (5 past violations).

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