There shall be provided, at the time any building or structure is erected or is enlarged or increased in capacity, or any use is established, off-street parking spaces for automobiles in accordance with the requirements herein; provided, however, that when an addition is made to an existing building, only the square feet in the addition need be used in computing the required parking. (Ord. 3153 § 2 (Exh. A), 2010; Ord. 1212 § 1, 1969; prior code § 33.801(A)).