Planning commission votes to align county ADU rules with state law, recommends ordinance to Board

The Nevada County Planning Commission unanimously recommended that the Board of Supervisors adopt an ordinance amending County Code Title 12 (Accessory and Junior Accessory Dwelling Units) to achieve compliance with state ADU law. Associate Planner Zachary Rubal told the commission that the county’s code previously limited detached ADUs on a lot with a multifamily dwelling to two units while state law allows up to eight; the proposed amendment corrects that single noncompliance item.

Staff recommended a categorical CEQA exemption under Section 15061(b)(3) because the amendment itself imposes no physical changes to the environment; any future physical development of ADUs would be subject to environmental review. Commissioners asked practical questions about where the change would apply in a largely rural county, and staff pointed to R2/R3 zoned parcels (for example the Lone Oak Apartments) as the most likely local situation where higher ADU counts could be used. Staff and commissioners also discussed that the state change applies statewide but is most applicable in denser, urban jurisdictions; county staff said attached ADUs were not part of the HCD corrective request and that any attached‑ADU policy could be revisited in the housing element update.

Commissioners also queried enforcement and legal exposure if the county remained noncompliant; staff noted potential risk to county enforcement and the possibility of legal challenge if the local ordinance is more restrictive than state law. After discussion the commission moved, seconded and voted Aye to forward the proposed ordinance and CEQA exemption recommendation to the Board of Supervisors.