94 open HPD violations at this address, 30 of them class C — the immediately hazardous tier — on a 334-unit elevator apartment building in Brooklyn.
3521 Neptune Avenue is a 334-unit building in Brooklyn, New York City (BBL 3069790100). This building is associated with Coney Island Site 4a2 Houses Inc. Brix tracks 94 open HPD violations for this property, along with inspection history, DOB filings, tenant complaints, and rent stabilization status.
Built in 1974, this elevator apartment building sits in Brooklyn and is tracked by Brix using public NYC records from HPD, DOB, ACRIS, and 311.
Tenants have filed 720 HPD complaints about this building over the last five years, most often about unsanitary condition.
What tenants have called the city about here over the last five years:
The most recent complaint on this building was filed October 5, 2026.
Conditions cited on open violations at this address:
The building last changed hands on June 11, 2015 for $66,035,377.99, according to recorded deeds.
Brix score: 44/100. View the Building Report on Brix.
See every NYC building owned by Coney Island Site 4a2 Houses Inc on the landlord portfolio page.
Part of Coney Island — see violations, complaints, and landlord activity across the whole neighborhood.
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Unit 1548 at 3521 Neptune Avenue has 22 open violations.
Unit 904 at 3521 Neptune Avenue has 8 open violations.
Unit 313 at 3521 Neptune Avenue has 6 open violations.
Unit 1942 at 3521 Neptune Avenue has 6 open violations.
Unit 2101 at 3521 Neptune Avenue has 5 open violations.
Unit 1108 at 3521 Neptune Avenue has 5 open violations.
Unit 1746 at 3521 Neptune Avenue has 4 open violations.
Unit 317 at 3521 Neptune Avenue has 3 open violations.
Unit 1542 at 3521 Neptune Avenue has 3 open violations.
Unit 1476FL at 3521 Neptune Avenue has 3 open violations.
Unit 422 at 3521 Neptune Avenue has 3 open violations.
Unit 1544 at 3521 Neptune Avenue has 3 open violations.
Unit 744 at 3521 Neptune Avenue has 2 open violations.
Unit 549 at 3521 Neptune Avenue has 2 open violations.
Unit 533 at 3521 Neptune Avenue has 2 open violations.
Unit 707 at 3521 Neptune Avenue has 2 open violations.
Unit 1541 at 3521 Neptune Avenue has 1 open violation.
Unit 741 at 3521 Neptune Avenue has 1 open violation.
Unit 2407 at 3521 Neptune Avenue has 1 open violation.
Unit 346 at 3521 Neptune Avenue has 1 open violation.
Unit 126 at 3521 Neptune Avenue has 1 open violation.
Unit 226 at 3521 Neptune Avenue has 1 open violation.
Unit 2343 at 3521 Neptune Avenue has 1 open violation.
Unit 510 at 3521 Neptune Avenue has 1 open violation.
Unit 2110 at 3521 Neptune Avenue has 1 open violation.
Unit 1709 at 3521 Neptune Avenue has 1 open violation.
Unit 334 at 3521 Neptune Avenue has no violations, last sold in 2015 for $66M.
Unit 532311 at 3521 Neptune Avenue has no open violations (1 past violation).
Unit 2402 at 3521 Neptune Avenue has no open violations (9 past violations).
Unit 2403 at 3521 Neptune Avenue has no open violations (6 past violations).
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