A 15-unit walk-up apartment building on the Brooklyn record, built in 1920.
21 Monitor Street is a 15-unit building in Brooklyn, New York City (BBL 3028320012). Brix does not yet have a current violation read for this property (not enough recent data), 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 2 HPD complaints about this building over the last five years, most often about water leak.
What tenants have called the city about here over the last five years:
The most recent complaint on this building was filed March 8, 2026.
The building last changed hands on July 9, 2025, according to recorded deeds.
Brix score: 89/100. View the Building Report on Brix.
Part of Greenpoint — see violations, complaints, and landlord activity across the whole neighborhood.
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