(A) Front yard requirements do not apply to the following: bay windows or balconies occupying in the aggregate not more than one-third of the front wall; provided that these projections come entirely within planes drawn from either main corner of the front wall, making an interior angle of 22.5 degrees in the horizontal plane with the front wall; chimneys, flues, belt courses, leaders, sills, pilaster, uncovered porches, plantings or similar features not over three feet high above the average finished grade and five feet distant from every lot line.
(B) In any district where the average depth of two or more existing front yards on lots within 100 feet of the lot in question and within the same block front is less or greater than the least front yard depth prescribed, front yards may be varied. The depth of the front yard on such lot shall not be less than the average depth of said existing front yards or the average depth on the two lots immediately adjoining or, in the case of a corner lot, the depth of the front yard on the lot immediately adjoining; provided, however, that the depth of a front yard on a lot in any “R” District shall be at least ten feet and need not exceed 60 feet.