A. Transitional Yards: Where a B-1 district adjoins a residential district, transitional yards shall be provided in accordance with the following regulations:
1. When lots in a B-1 district front on the street and at least eighty percent (80%) of the frontage directly across the street between two (2) consecutive intersecting streets is in a residential district, the front yard regulations for the residential district shall apply to the said lot in the business district.
2. In a B-1 district, where a side lot line coincides with a side or rear lot line of property in an adjacent residential district, a yard shall be provided along such side lot line. Such yard shall be equal in dimension to the minimum side yard which would be required herein for a residential use on the adjacent property in a residential district.
3. In a B-1 district, where a rear lot line coincides with a side lot line of property in an adjacent residential district, a yard shall be provided along such rear lot line. Such yard shall be equal in dimension to the minimum side yard which would be required herein for a residential use on the adjacent property in the residential district.
4. In a B-1 district, where the extension of a front or side lot line coincides with the front lot line of an adjacent lot located in a residential district, a yard equal in depth to the minimum front yard required herein on such adjacent lot in the residential district shall be provided along such front or side lot line for a distance of at least twenty five feet (25'), including the width of any intervening alley, from the lot in the residential district.
Transitional yards shall be unobstructed from lowest level to sky.
B. Side Yards: If an interior side yard is provided, it shall be not less than ten feet (10') wide.
C. Rear Yard: A rear yard of not less than twenty feet (20') in depth. (Ord. B-39, 1969)
D. Exception: In the case of an enlargement of an already existing building the front and rear yards of the enlarged building need not exceed the front and rear yards as already exists with respect to the existing building. (Ord. B-80, 2-16-1971)