Planning commission recommends city adopt changes to ADU rules, cites limited local discretion under state law

The Greenfield Planning Commission voted to recommend that the City Council adopt an ordinance amending Chapter 17.90 of the Greenfield Municipal Code to bring local rules for accessory dwelling units (ADUs) into compliance with recent state housing law.

The recommendation, adopted by a voice vote, directs staff to draft an ordinance with the state-required modifications and submit it to the State Department of Housing and Community Development for review. The motion to adopt the Planning Commission resolution (Resolution 2025-1) was made and seconded during the meeting and approved on a majority voice vote.

Commissioners and staff spent the bulk of the item discussing how much local discretion remains under state law. A staff presenter explained that “the state is throwing the hammer on local jurisdictions” and that recent housing requirements reduce local options, which is why the city must update its ordinance. The presenter said staff had organized a draft to address statutory requirements and to streamline certain processes.

Commissioner Mendoza asked whether the city maintains preapproved ADU plans like the county’s “one-bedroom, two-bedroom, three-bedroom” templates; staff replied, “No, Commissioner Mendoza. We do not have preapproved plans. We're working to get that accomplished.” Commissioners asked whether preapproved plans would include garage conversions; staff said that was not yet decided.

A public commenter referenced Assembly Bill 3057, effective Jan. 1, which the commenter said pertains to junior accessory dwelling units (JADUs). During the discussion staff clarified differences between JADUs and ADUs: JADUs are interior conversions that typically do not create a separate dwelling with full facilities, while ADUs must include independent facilities such as a kitchen and bathroom.

Commissioners raised parking and public-safety questions repeatedly. One commissioner asked for examples of what a locality might cite as a public-safety basis to deny an ADU; staff said the statutory language is broad and typically ties back to building-code or safety deficiencies such as unusable exits or walls that create unsafe conditions. Staff also warned that state enforcement mechanisms used for other housing-law compliance—sometimes including forcing project approvals—could be applied to ADUs.

The commission discussed owner-occupancy rules and a removal of a sunset that had previously allowed owner-occupancy requirements; the staff presentation said the draft ordinance would remove the prior owner-occupancy prohibition sunset and would enable local agencies to consider separate conveyance of ADUs as condominiums only where the municipal code allows.

After discussion, a commissioner moved to adopt Resolution 2025-1 recommending the ordinance; another commissioner seconded. The motion carried on a voice vote.

The commission asked staff to return with additional details about preapproved plan options, whether garage conversions will be explicitly treated as ADUs in the local code, and clarifications on parking standards. Staff noted it will also circulate a housing-law handbook and an upcoming webinar on ADU law for commissioners.