No building shall be erected or enlarged in R-1 Districts unless the following yards are provided and maintained in connection with such building, structure or enlargement:
(a) Front Yard. A front yard of not less than thirty feet, or twenty percent of the depth of the lot, whichever is less.
(b) Side Yards. A side yard on each side of the main structure of not less than eight feet, except where a side yard adjoins a street the minimum width of such yard shall not be less than fifteen feet.
(c) Rear Yard. A rear yard of not less than thirty feet.
(Ord. 10-16-67. Passed 11-20-67.)