17.86.040 Development standards.
Development standards ensure that accessory dwelling units maintain and are compatible with the single-family appearance and character of the principal residence, lot, and neighborhood. All ADUs must conform to the following standards:
A. Codes. The ADU shall conform to all applicable codes, laws, and regulations.
B. Design. Attached ADUs shall maintain the style and exterior finishes consistent with the existing structure. Detached ADUs shall have exterior finishes that are consistent with local industry standards for residential exterior cladding. All exterior work shall be completed within eight months of start of construction.
1. Accessory dwelling units contained within the principal dwelling unit shall be connected to each other by an interior door.
2. There may be only one entrance located on each front or street side of the residence.
C. Height. The maximum height of a detached ADU shall be 25 feet.
D. Lot Area. The combined square footage of the principal and accessory dwelling units may not exceed the lot area coverage in the underlying zoning district.
E. Orientation. On lots of 40,000 square feet or less, detached ADUs shall be located at least 10 feet behind the front plain of the principal dwelling unit. On lots of 20,000 square feet or over, should the placement of the ADU in the rear of the lot negatively impact a neighbor’s view shed, a waiver from this requirement may be requested from the planning and zoning commission. Testimony from the impacted neighbors is encouraged.
F. Parking. One parking space shall be provided on site for each studio and one-bedroom ADU. Two parking spaces shall be provided on site for each two-bedroom ADU. Parking for the accessory unit is in addition to the required parking for the principal dwelling.
G. Setbacks. ADUs are subject to the setback and coverage requirements of the underlying zone.
H. Size. The ADU shall not be more than 40 percent of the gross floor area of the principal dwelling unit. An ADU may not be less than 300 square feet or more than 900 square feet. A maximum of two bedrooms is permitted. An ADU in the established central business district overlay zone may not exceed 50 percent of the gross floor area of the principal dwelling unit. (Ord. 21-010 § 4, 2021; Ord. 07-026 § 4, 2007)