For unincorporated San Luis Obispo County, unpermitted construction remains subject to enforcement until it is properly permitted and inspected, regardless of when it was built. The County says an owner seeking to keep the work must obtain an as-built construction permit; demolition is the other listed option. Its AB 2533 instructions apply only to homeowners seeking to legalize an ADU or JADU built before January 1, 2020.
Select the checklist that matches the structure
The County’s process begins with Form BLD-1062 and one of three checklists. BLD-1063A is for an ADU/JADU inside an existing permitted structure. BLD-1063B applies when the permitted structure includes an unpermitted addition. BLD-1063C is for a unit inside a structure that was never permitted. The construction history of the main building and any later additions therefore affects which documents and review path apply.
The County’s page also identifies Form BLD-1065 for a pre-2020 ADU using an onsite wastewater treatment system, when applicable. Depending on the selected checklist and site, submittals may include plans, structural information, mechanical, electrical and plumbing documentation, wastewater materials and a housing-condition inspection. The applicant must include any required documents and obtain the inspections specified by the County; this guide is not a substitute for the current checklist.
Submit a complete application
The County also requires a construction-permit application and signed Non-Compliance Agreement. It says incomplete or unsigned applications will not be accepted. As-built permit applications are currently submitted on paper at the Permit Center, with an appointment recommended to ensure staff availability. The general as-built process includes a non-compliance fee; AB 2533 provisions may affect some permit and inspection fees, as described in the applicable forms.
Use the County’s Unpermitted / As-Built instructions and linked forms for the current submittal. Confirm whether the address is in the unincorporated County, which structure branch applies, what wastewater documentation is needed, and what final inspection will close the permit. A permit application alone does not legalize the unit.