No building or structure shall be erected, constructed, reconstructed, moved or altered, nor shall any building, structure or land be used for any purpose other than is permitted in the district in which such building, structure or land is situated.

No building or structure shall be erected, constructed, reconstructed, moved or altered to exceed the height or area limit herein established for the district in which such building or structure is situated.

No lot area shall be reduced or diminished so that the yards or other open spaces shall be smaller than prescribed by this Chapter, nor shall the density of population be increased in any manner, except in conformity with the area regulations established herein.