(A) Is there a limit on the number of ADUs per primary dwelling? Yes. There may be only one ADU for each primary dwelling, whether internal or external.
(B) Are there limits on the occupancy of ADUs? Yes.
(1) The property owner may occupy either the primary dwelling or the ADU. ADUs (internal or external) may not be rented for fewer than 30 consecutive days.
(2) An ADU may be converted to a short-term rental only via approval of a CUP for a short-term rental, as provided by § 153.204 and other provisions of this chapter.
(C) Is there a maximum size for ADUs? Due to state law, there are different answers for external and internal ADUs.
(1) EADUs in the GM and LDR zoning districts shall not exceed 1,000 square feet in size.
(2) EADUs in the MDR shall not exceed 800 square feet in size.
(3) EADUs in the HDR shall not exceed 600 square feet in size.
(4) IADUs must fit within the footprint of the primary dwelling at the time the application for a building permit for the IADU is established.
(D) What about the added load an ADU may place on the wastewater system for the primary dwelling? Due to state law, there are different answers for external and internal ADUs.
(1) The applicant must demonstrate that the existing on-site wastewater disposal system is adequate to support an EADU or that the existing system will be upgraded before a certificate of occupancy for the EADU is issued.
(2) An IADU may not be established in a primary dwelling that is served by a failed on-site wastewater system. (Ord. 2018-4, passed 1-3-2019; Ord. 2021-7, passed 12-2-2021)