No building or other structure shall be erected, moved, or added to, without a permit therefor issued by the Zoning/Building Administrator. No zoning/building permit shall be issued except in conformity with the provisions of this chapter, except after written order from the Board of Adjustment. Fees for zoning/building permits shall be as provided by Council resolution. Zoning/building permits shall be applied for with the Clerk and shall expire two years after the date of issuance if work is begun within 180 days of issuance or after 180 days if no substantial beginning of construction has occurred. Extensions of time may be granted in writing by the Zoning/Building Administrator for good cause. The construction or erection of signs and billboards or buildings less than 10¢ x 12¢ in size are exempt from the permit requirements of this section, but such work shall comply with all other regulations in this Zoning Ordinance. In addition, development within the extra-territorial area to which these powers are extended shall be required to secure only approval of a zoning permit and shall not be required to obtain a permit under any building code provisions of the City.