Definition: A boroughlet, also known as a "bloc," is a unit of measurement in urban planning and real estate that represents the area covered by a single block of land. Each boroughlet is typically defined as an 800-square-foot square mile (216 km²) area, which can be subdivided into smaller units called blocks. Boroughlets are used to calculate property taxes and property values in urban areas. They are also used for planning purposes, such as determining the