The regulations set by this chapter within each district shall be minimum regulations and shall apply uniformly to each class or kind of structure or land, except as hereinafter provided:

   1.   No building or structure or part thereof shall hereafter be erected, constructed, reconstructed or structurally altered unless in conformity with all of the regulations herein specified for the district in which it is located.

   2.   No building or other structure shall hereafter be erected or altered:

      A.   To exceed the height limit herein established;

      B.   To accommodate or house a greater number of families;

      C.   To occupy a greater percentage of lot area except as approved by the Planning and Zoning Commission and Council as a non-conforming use of land;

      D.   To have narrower or smaller rear yards, front yards, side yards, or other open spaces; or in any other manner be contrary to the provisions of this chapter.

      E.   Which increases its non-conformity.

   3.   Yards or parts of a yard or other open space, or off-street parking or loading space required about or in connection with any building for the purpose of complying with this chapter shall not be included as part of a yard, open space, or off-street parking or loading space similarly required for any other building.

   4.   Yards or lots existing at the time of passage of this chapter shall not be reduced in dimension or area below the minimum requirements set forth herein. Yards or lots created after the effective date of this chapter shall meet at least the minimum requirements established by this chapter.

   5.   All new residential structures shall meet the minimum square footage requirements as specified in the various zoning districts. The minimum dimension of new residential structures shall be 20 feet in width and length.