(a) The depth required by the schedule of height and area regulations for rear yards shall be the depth exclusive of any portion used for accessory buildings.
(b) In computing the depth of a rear yards for any building where such yard opens into an alley, one-half the width of such alley may be considered as a portion of the yard.
(c) In measuring the depth of rear yards, in cases where the rear lot line is not parallel with the street line, average dimensions may be used.
(d) In a retail business district located within an "A" or "B" residence district, a building not used in whole or in part as a dwelling shall not require a rear yard except when bordering on a residence district, in which case a rear yard at least fifteen feet in depth shall be required adjacent to such district.
(e) In any residence district, no dwelling shall be so located on a lot that the rear thereof faces a street line unless such dwelling be located thirty feet or more from such street line.
(Passed 6-17-57; 8-8-78.)