Porches, sun decks and house decks and other attached accessory structures. No porch, sun or house deck or other such attached accessory structure, whether open or enclosed, shall encroach upon any required front, back or side setback, and no such porch or deck shall be erected, covered, roofed, sided or otherwise enclosed unless approved by the Code Enforcement Officer, and all necessary permits therefor have been issued. Porches, decks or other attached accessory structures, whether open or enclosed, shall be included in any computation of building coverage.