On properties currently in use where setback lines are not established the following shall govern:
(a) On property fronting upon any street where forty percent or more of such frontage is improved with residences, all future buildings shall maintain a frontage aligned with the existing buildings. Such alignment shall be regular within a range of variation no greater than three feet. For cases where existing alignments vary to a greater extent, the Planning Commission shall establish rules for defining and regulating building lines as may in its opinion serve the purpose of this section.
(b) On property fronting upon any street where sixty percent or more of such frontage is improved with buildings that are built at the street line, the street line shall be the building line.
(c) Whenever any parcel of land now separately owned, and which was so owned prior to the passage of this chapter (January 20, 1975), is of such restricted area that it cannot be appropriately improved without building beyond the front yard line established by the above sections, the Planning Commission shall, on application in a specific case, authorize the construction of a building beyond such front yard line to an extent necessary to secure an appropriate improvement of such parcel of land.
(d) On lots adjoining a street frontage along which either no building line or a front yard line nearer to the street is provided; the Planning Commission may, upon application in a specific case, permit a building or a portion thereof to be erected beyond the building line as herein provided.
(Ord. C79-74. Passed 1-20-75.)