BBL Lookup

Enter a Borough-Block-Lot (BBL) number to pull up everything Nosy Neighbor has on that NYC property: taxes, violations, permits and deed history, in one report.

BBL number (10 digits) Look up this BBL

Know the block but not the lot?

Find the ZIP code for a borough + block without needing the tax lot.

Borough Select a borough Manhattan Bronx Brooklyn Queens Staten Island Tax block number Find this block's ZIP

Only have the address?

Search by address instead — Nosy Neighbor resolves the BBL for you automatically, including for a condo unit whose own lot differs from the building's.

Not sure what a BBL is?

The BBL number guide explains what the digits mean, why the city assigns one per tax lot, and how it relates to a building's BIN. The Data Glossary covers every other field in a report.