A unique 7-digit number assigned by DOB to every building in NYC.
Last updated: March 2026 · 9.4M+ properties indexed
BIN (Building Identification Number) is a unique identifier assigned to each building by the Department of Buildings. While BBL identifies a tax lot, BIN identifies a specific building — important because a single lot can contain multiple buildings.
BIN is used extensively in DOB records for permits, violations, and inspections. RegWatch supports search by BIN in addition to address and BBL.
A 7-digit Building Identification Number assigned by DOB to every building in NYC. Used for permits, violations, and inspections.
Search the address on RegWatch or DOB's BIS system. The BIN appears in the property profile.
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