Active Class C violations for heat, locked boiler doors, and defective self-closing doors define the file for this 17-unit Park Slope rental.
This 17-unit Park Slope pre-war building carries 9 open violations, 8 of which are Class C—the city's immediately hazardous tier. Operational issues center on boiler access, missing hot water, and broken self-closing fire doors. Three things to know:
Boiler access is blocked by locks, while heat and hot water complaints persist. Inspectors logged Class C violations in June 2026 because the cellar boiler room door was locked, preventing access to the heating system. That write-up accompanied a Class C violation for no hot water in Apt 3D and 34 heat or hot water complaints over the last three years.
Self-closing fire doors fail to latch across multiple upper floors. Multiple apartments carry active Class C citations for entrance doors that fail to self-close, including Apt 3D and Apt 4D. In a pre-war building, malfunctioning fire doors represent an uncorrected safety hazard left sitting on the official file.
Food establishment calls within three blocks point to potential kitchen venting issues. Within three blocks, neighbors logged 8 food establishment complaints over the trailing year. Commercial kitchen venting and exhaust can push odors or heat through shared shafts and rear windows in older pre-war structures.
Quieter signals on this building and the blocks around it:
400 6th Avenue is a 17-unit building in Brooklyn, New York City (BBL 3009990038). This building is associated with Gh 400 6 Ave Fee LLC. Brix tracks 7 open HPD violations for this property, along with inspection history, DOB filings, tenant complaints, and rent stabilization status.
Built in 1905, 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 97 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 10, 2026.
Conditions cited on open violations at this address:
The building last changed hands on January 11, 2024 for $3,300,000, according to recorded deeds.
Brix score: 26/100. View the Building Report on Brix.
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Unit 3D at 400 6th Avenue has 2 open violations.
Unit 4D at 400 6th Avenue has 1 open violation.
Unit 1C at 400 6th Avenue has 1 open violation.
Unit 4B at 400 6th Avenue has no open violations (3 past violations).
Unit 3B at 400 6th Avenue has no open violations (9 past violations).
Unit 2B at 400 6th Avenue has no open violations (2 past violations).
Unit 1A at 400 6th Avenue has no open violations (1 past violation).
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