A 38-unit walk-up apartment building on the Brooklyn record, built in 1927.
6901 21st Avenue is a 38-unit building in Brooklyn, New York City (BBL 3061640006). This building is associated with Mark Polanski. Brix tracks 0 open HPD violations for this property, along with inspection history, DOB filings, tenant complaints, and rent stabilization status.
Built in 1927, 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 6 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 June 19, 2025.
Brix score: 100/100. View the Building Report on Brix.
See every NYC building owned by Mark Polanski on the landlord portfolio page.
Part of Borough Park — see violations, complaints, and landlord activity across the whole neighborhood.
Other buildings in 11204:
Browse every NYC neighborhood or the landlord directory on Brix.
Unit 4A at 6901 21st Avenue has no open violations (2 past violations).
Unit 3H at 6901 21st Avenue has no open violations (3 past violations).
Unit 2E at 6901 21st Avenue has no open violations (1 past violation).
Own or manage this building? Monitor it or correct the record.