No yard or other open space provided around any building for the purpose of complying with the provisions of this chapter, shall be considered as providing a yard or open space for any other buildings, and no yard or other open space on one lot shall be considered as providing a yard or open space for a building on any other lot.

All yards facing on a public street shall be considered front yards and shall conform to the minimum front yard requirements for the zone in which located, except as otherwise provided in this chapter.

Every part of a required yard shall be open and unobstructed from its lowest level to the sky, except for the ordinary projections allowed by the State Uniform Construction Code including, but not limited to, sills, belt courses, chimneys, flues, buttresses, ornamental features and eaves, provided, however, that none of the aforesaid projections shall project into the minimum required yards more than 24 inches, unless otherwise permitted by this chapter. Unroofed entrance porches or terraces, which do not rise above the height of the floor level of the ground floor, may extend into any yard providing the total area of all such porches, which extend into such yards, does not exceed 1,000 square feet.