Accessory Buildings as Part of Principal Buildings. Any accessory building attached to a principal building shall be considered part of the principal building and the total structure shall adhere to the yard requirements for the principal building regardless of the technique of connecting the principal and accessory buildings.

Accessory Buildings Not to Be Constructed Prior to Principal Buildings. No building permit shall be issued for the construction of an accessory building prior to the issuance of a building permit for the construction of the main building upon the same premises. If construction of the main building does not proceed or coincide with the construction of the accessory building, the Construction Official shall revoke the building permit for the accessory building until construction of the main building has proceeded substantially toward completion.

Distance from Adjacent Buildings. The minimum distance of portion of the accessory building from an adjacent building on the same lot shall be 20 feet.

Height and Area of Accessory Buildings. Accessory buildings shall not exceed one story or 15 feet in height and may not occupy more than 25% of the yard in which located or a maximum of 900 square feet, whichever is smaller.

Location. A detached accessory building shall comply with all street yard requirements. Such accessory building shall be permitted to have a minimum rear yard setback of five feet and a minimum side yard setback of five feet.

Second Dwelling Prohibited. In no case shall there be permitted more than one residential structure on a lot.