Side yard width may be varied. Where the side wall of a building is not parallel with the side lot line or broken or otherwise irregular, the side yard may be varied. In such case the average width of the side yard shall not be less than the otherwise required minimum width; provided, however, that such side yard shall not be narrower at any point than one-half the otherwise required minimum width.

Side yard of corner lot. The side street setback line of any corner lot platted on the borough's tax maps as the lot existed on December 28, 1964, or any corner lot shown on any subdivision plat which received final approval prior to December 28, 1964, shall not be less than 1/2 of the depth of the minimum front yard required on any adjoining lot fronting on a side street. Any corner lot delineated by subdivision after December 28, 1964, shall provide a side street setback line which shall not be less than the minimum front yard required on any adjoining lot fronting on a side street.

Front yard exception. When a vacant lot is situated between two improved lots, each having a principal building within 50 feet of any side lot line of such vacant lot, the front yard may be reduced to the greatest depth of the front yard of the two adjoining lots, but shall be no less than 15 feet; provided that where any lot shall front on a right-of-way which is proposed on the Official Map of Keyport Borough to be widened, the front yard of such lot shall be as required in the district where such lot is located and shall be measured from such proposed future right-of-way.

Projections into required yards. Certain architectural features may project into required yards as follows: