ADU Zoning Ordinance Amendment—Including Separate Sale of ADUs—Adopted by Board of Supervisors

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10 minutes ago
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On March 4, 2026, the County Board of Supervisors voted unanimously to adopt an amendment to update the ADU Ordinance and implement Assembly Bill (AB) 1033, which allows for the separate sale of Accessory Dwelling Units (ADUs) in unincorporated communities through a condominium conversion process.

The County’s implementation of AB 1033 will go into effect on April 4, 2026. County staff are currently developing guidance materials and an application checklist to assist property owners and applicants in navigating the application process.

During the hearing, the Board also directed staff to return within 120 days with potential policy options, specific to the separate sale of ADUs, that could support opportunities for first-time homebuyers and provide existing tenants in ADUs the first opportunity to purchase the unit.

In response to this Board direction, staff will develop new options for the Board’s consideration. Prior to returning to the Board, these options will be released for public disclosure, and staff will host a public webinar later this spring to provide an overview and receive feedback. Options may be further refined based on public engagement.

Additional information about the webinar and opportunities to provide input will be shared with the public in the coming months.

For more information about the County’s ADU program, resources, and application requirements, please visit the ADU Ordinance Amendment project webpage: ADU Zoning Ordinance Amendment