The "Subdivision Map Act" (Gov. Code §66410 et seq.) regulates and controls the design and improvement of subdivisions. Any property divided into two or more parcels is subject to the Map Act.

Parcel Map. A "parcel map" is a land division map used to create of four (4) or fewer residential lots. In the case of commercial, industrial, and agricultural zoned property, more than four lots can be created by parcel map.

Tract Map. Subdivision or Tract Maps are used in planned developments with five or more lots to show the boundaries and location of each lot and the common areas.