A nonconforming use of a building or structure may be extended throughout the interior of the building or structure, provided that no structural alterations are made, no increase in parking spaces or areas is required, no increase in noise, smoke, odor, light or traffic shall result, no increase in size or use of outdoors displays shall occur, and no change in the exterior appearance of the building or structure or lot shall occur. Any such expansion or extension shall be in conformance with all applicable local, state and federal ordinances, laws, statues and regulations and the appropriate permits including a zoning permit shall be obtained prior to any such extension or expansion.