(a) In a Class B1 Building Line District, where the buildings on 20% or more of the frontage on one side of a street between two intersecting streets are set back from the street line, the alignment of the existing buildings shall be the building line. For the purpose of determining the percentage of the frontage that is improved with buildings which are set back from the street line, the frontage of that portion of the open space adjacent to a building which is used in connection with such building shall be included. Minor irregularities in such alignment of existing buildings may be disregarded by the Board of Zoning Appeals in defining and applying this building line regulation, or the Board may, when in its opinion the general purpose and intent of this section will be better served thereby, determine that the average distance the existing buildings are back from the street line shall be the building line.
(b) In a Class B1 Building Line District, where less than 20% of the frontage on one side of a street between two intersecting streets is improved with buildings, the distance of the building line from the street line shall be 15% of the average depth of the lots along such frontage but need not be more than 30 feet.
(Ord. 4761, passed 11-17-1953)