Vacaville planning commission recommends replacing ADU ordinance to conform with new state rules
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Summary
The commission recommended that the City Council repeal and replace Vacaville’s accessory dwelling unit ordinance to incorporate 2025 state ADU laws (AB 462, AB 1154, SB 9, SB 543); commissioners pressed staff for clarity on fee thresholds, parking exemptions and outreach. The commission voted to forward the measure for council consideration.
The Vacaville Planning Commission on Dec. 16 recommended the City Council repeal and replace the city’s accessory dwelling unit (ADU) ordinance to align with 2025 state laws that change permitting, occupancy and fee rules for ADUs and junior ADUs.
“Given these updates to the state legislation, staff are seeking to implement a zoning text amendment to repeal and replace our accessory dwelling unit ordinance,” a staff presenter said, noting the city’s ordinance must “comply with state legislation or be deemed null and void.”
Why it matters: Changes enacted this year by the Legislature — identified in staff materials as AB 462, AB 1154 and SB 9 and SB 543 — alter how livable space and ADU/JADU counts are defined, allow certain JADUs to be occupied off-site when they have separate sanitation, and exempt ADUs/JADUs under specified sizes from development and school impact fees. The city’s proposal would incorporate those state requirements, reorganize the code for clarity and add references to the city’s preapproved ADU program.
Commissioners pressed staff for specifics during the question period. Commissioner Beaumont asked why one page of the staff packet referenced an ADU size of 750 square feet while a later page said no impact fees applied for units under 800 square feet; staff acknowledged the apparent typo and said the ordinance text would be corrected.
Commissioners also questioned parking exceptions. Staff said the ordinance largely mirrors state ADU rules and that some state provisions eliminate parking requirements where an ADU is near transit or meets other criteria; staff added that if the city imposes stricter rules that conflict with state law, the state could preempt local regulation.
There were no public speakers for the ADU item. After discussion, the commission moved, seconded and approved a recommendation for the City Council to adopt a resolution reaffirming the city’s general plan environmental impact report and to introduce an ordinance amending Title 14 of the Vacaville Municipal Code to repeal and replace section 14.09.270.04 on accessory dwelling units.
Next steps: The commission’s recommendation will be transmitted to the City Council for its consideration; staff said outreach materials and additional clarifying language will be prepared before that council hearing.
