“Accessory building” means a detached building the use of which is appropriate, subordinate and customarily incidental to the principal building or the principal use of the land, and is located on the same lot as the principal building or principal use of the land. A building shall not be accessory and shall be considered to be part of the principal building when joined to the principal building by a common wall at least four feet long or when connected to the principal building by a breezeway that is eight feet or less in length. (Ord. 573 § 2, 1990).