Accessory use

An accessory use is one located on the same zoning lot as a principal use, clearly incidental to it, and customarily found in connection with it — the classic three-part flavor of the definition. Parking that serves a building's occupants, storage that serves its business, and a small professional office within a dwelling are the familiar examples, each lawful because it rides with a principal use the district permits.

The category matters at the margins: an activity that outgrows 'incidental' becomes a principal use needing its own permission, and enforcement records frequently turn on exactly that line. What counts as customary evolves with the current text, which is where any real determination belongs.