Lots in the hillside areas may be developed in accordance with the following variations in property development standards, subject to commission review and approval:
A. On property having a downhill slope of twenty five percent (25%) or greater, measured in the general direction of the side lot lines, an additional story may be constructed on the main building; provided, however, that the ceiling of the lowest story shall be not more than two feet (2') above the curb level, measured at the center of the lot frontage.
B. 1. On property having uphill or downhill slopes, as described in subsection A of this section, the commission may approve the construction of a residence or garage in the required front yard.
2. Authorized construction shall commence within a period of one year from the date of commission approval. The commission may grant an extension of time not to exceed one year upon determination of cause by the applicant.
3. Any change in conditions that pertained to the property at the time of approval shall void the approval.
C. Where no other method of access can be provided to serve lots in hillside areas, where the slope of the street is greater than ten percent (10%), and where the slope of the land is greater than twenty percent (20%), a private way not less than twenty feet (20') in width may be approved by the commission. (Ord. 1000 § 45.05, 1955)