Temporary permits may be issued by the Zoning Enforcement Officer for a period not exceeding one (1) year, for nonconforming uses incident to housing and construction projects, including such structures and uses as storage of building materials and machinery, the processing of building materials, and a real estate office located on the tract being offered for sale, provided such permits are conditional upon agreement by the owner or operator to remove the structure or structures or use upon expiration of the permit. Such permits may be reviewed upon application to the Zoning Enforcement Officer for an additional period not exceeding one (1) year.