17.204.440   R-1B zone-Setbacks.
   A.   Front-yard setback. The minimum front-yard setback is determined as follows:
      1.   If there are at least two other buildings with front-yard setbacks on the same side of the street on the same block as the lot for which the setback is being determined, the front-yard setback must be equal to either of the two nearest buildings' setbacks or in between the two nearest buildings' setbacks.
      2.   If there is only one other building with a front-yard setback on the same side of the street on the same block as the lot for which the setback is being determined, the minimum front-yard setback is the front-yard setback of that building.
      3.   If there is no other building with a front-yard setback on the same side of the street on the same block as the lot for which the setback is being determined, the minimum front-yard setback is 20 feet.
   B.   Interior side-yard setback.
      1.   Unless paragraph 2 of this subsection applies, the minimum interior side-yard setback is five feet.
      2.   A minimum interior side-yard setback of 3 feet applies to interior lots having a width of less than 52 feet and corner lots having a width of less than 62 feet.
      3.   No interior side-yard setback is required along the common-wall boundary of a subdivided duplex dwelling.
   C.   Street side-yard setback. The minimum street side-yard setback is 3 feet.
   D.   Rear-yard setback.
      1.   Unless paragraph 2 of this subsection applies, the minimum rear-yard setback is 15 feet.
      2.   If the rear lot line abuts a public alley, the minimum rear-yard setback is five feet.
   E.   Levee setback. A minimum 20-foot setback from the landside toe of any flood control levee is required for development less than five acres in size. A minimum 50-foot setback is required from the landside toe of any flood control levee for development five acres or greater in size. No primary or accessory structures may encroach into the levee setback. (Ord. 2017-0061 § 13; Ord. 2015-0031 § 4; Ord. 2013-0020 § 1; Ord. 2013-0007 § 1)