"Storage structure, non-accessory" ("Non-accessory storage structure") means a structure used for storage of belongings, not accessory to a single-family or duplex residence located on the same building site, not designed for human habitation, and not used for remunerative purposes. This term shall not include agricultural buildings. (Added by Amended Ord. 06-057, Aug. 2, 2006, Eff date Aug. 14, 2006).