Cornices, eaves, belt courses, balconies, greenhouse and bay windows (as defined in Section 25.50.008(E) below) or similar architectural features may cantilever into a required front or rear yard a distance equal to twenty percent of the required front or rear yard. Architectural features (exclusive of balconies) may cantilever into a required side yard a distance equal to forty percent of the required side yard; however, in no event shall any eave, belt course, be constructed less than two and one-half feet, or four feet in the case of green house or bay windows, including the window in an open position, from the side property line, or less than five feet from any other cornice, eave, belt course, greenhouse or bay windows or similar architectural feature on the same lot.