The building housing the main use of the property on which it is situated. A building housing an accessory use is considered an integral part of the principal building, when it has any part of a wall in common with the principal building or is under an extension of the main roof and designed as an integral part of the principal building. A building which is not considered an integral part of the principal building shall be deemed a detached accessory building. A structure which is attached to the principal building but which does not have a roof shall be considered an accessory structure, and shall not be considered part of the principal building. [Ord. 1267, 09-14-09.]