Effective July 1, 2005, no dwelling, building, or structure shall hereafter be erected, placed, altered, or converted on any lot unless the lot is substantially regular in shape. Substantially regular in shape shall mean a lot that has a shape factor of 35.0 or less. Shape factor shall be determined by dividing the square of the sum of the perimeter dimensions of the lot by the area of the lot. Shape factor = (sum of perimeter x sum of perimeter)/area of the lot.