Accessory uses are uses that are on the same lot as the principle use and are subordinate, incidental to and customarily found in connection with the principal use. Accessory uses can be left undefined beyond “customary incidental and subordinate”, or permitted and prohibited uses can be listed, or allowed by special permit.
To provide some flexibility in use of property.
The flexibility provided here can be abused to over-expand the intensity of use or establish an inappropriate use. It may be difficult to enforce accessory use regulations against educational or religious institutions.
Provides flexibility of use of the property and can help create complete mixed use neighborhoods. By enabling mixed-use, can reduce traffic related to commuting.
Gaining Ground Working Paper