A Property’s Borough, Block and Lot Number
Each property in New York City is identified by a set of 3 numbers called the Borough, Block, and Lot (BBL). BBLs are used by many city agencies to identify real estate for taxes, zoning, construction, and other purposes.

It is very important for property owners to know their BBL when contacting a city agency.  Finance uses these numbers on most property correspondence. The easiest place to find your BBL is on your Statement of Account (SOA).

The Borough number is always first:
1 = Manhattan
2 = Bronx
3 = Brooklyn
4 = Queens
5 = Staten Island

The Block number is second and can be up to 5 digits.

The Lot number is last and can be up to 4 digits.

An example for a property in Queens would be: 4/99999/99

 Look up BBL by the Property Address