Administrative overview · FIPS 06097
Sonoma County permit authority
The first compliance decision is jurisdictional: identify the office with statutory authority over your parcel, then use its filing and inspection sequence to keep the project moving.
Jurisdictional status
County
This county profile is the primary starting point for unincorporated-area permitting.
Responsible agency
Sonoma County Permit Sonoma (Permit and Resource Management Department) - Building Division
For a project in or near Sonoma County, this office is the identified point of contact for permit intake, statutory code enforcement, plan review coordination, and inspection release conditions. Confirm the parcel’s boundary and project type before relying on the county lane.
Direct contact
(707) 565-1900; automated inspection scheduling (707) 565-3551
Call before mobilizing if the project has a boundary, occupancy, fire, septic, or utility question.
Permit counter
Permit Sonoma, 2550 Ventura Avenue, Santa Rosa, CA 95403
Operating hours
In-person counter: Monday-Tuesday and Thursday-Friday, 8:00 a.m.-4:00 p.m.; Wednesday, 10:30 a.m.-4:00 p.m. Planner phone hours are Monday-Friday, 10:00 a.m.-noon.
Review expectation
N/A for ordinary building plan review; Permit Sonoma does not publish one universal review duration. For qualifying accessory dwelling units, Sonoma County rules provide a 120-day approval-or-denial limit from a complete application unless the applicant voluntarily requests a longer timeframe.
Compliance workbench
Choose the next project decision.
Apply online
Open the verified digital gateway, application form, and review timeline.
Open guide →Fees & penalties
Understand fee schedules, enforcement exposure, and stop-work liabilities.
Open guide →Codes & exemptions
Read the code framework, minor-work exemptions, and inspection lane.
Open guide →Agency website
Visit the primary public source for current notices and contact changes.
Open guide →Source trail
Official sources for this profile
Use these direct agency or licensing links to confirm current instructions before you file, pay, or schedule work. External pages control if their information differs from this directory.
Project questions
Frequently asked questions for Sonoma County
Who handles permitting for this jurisdiction?
Sonoma County Permit Sonoma (Permit and Resource Management Department) - Building Division is the identified county-level authority for this profile. Confirm that the property is in its service area before filing.
How should I begin an application?
Begin with the online permit gateway listed in the application guide. If the portal does not recognize the address or project type, contact (707) 565-1900; automated inspection scheduling (707) 565-3551.
How long might review take?
N/A for ordinary building plan review; Permit Sonoma does not publish one universal review duration. For qualifying accessory dwelling units, Sonoma County rules provide a 120-day approval-or-denial limit from a complete application unless the applicant voluntarily requests a longer timeframe.
How are inspections scheduled?
After linking the permit to a Permit Sonoma online account, applicants can schedule inspections through the Permits Online portal. Permit Sonoma materials also identify the automated inspection line (707) 565-3551; have the permit number, job address, and inspection type/code available. Keep the job card and approved plans available, and do not conceal work before required inspection.
Which codes and exemptions should I review?
Sonoma County Ordinance 6539, adopted September 12, 2025, adopts with local amendments selected provisions of the 2025 California Building Standards Code, including the 2025 California Building Code, Residential Code, Electrical Code, Mechanical Code, Plumbing Code, Energy Code, Green Building Standards Code, Fire Code, Wildland-Urban Interface Code, and Existing Building Code, as applicable to the project and unincorporated county area. Common California/County exemptions include one-story detached accessory sheds, storage buildings, or playhouses up to 120 sq. ft.; qualifying minor finish work; and other Title 24 Section 105.2/106.2 exemptions. Permit Sonoma states that electrical, mechanical, and plumbing work serving a permit-exempt structure still requires permits, and exemption does not waive Planning, Emergency Services, minimum construction, or other applicable rules. A separate agricultural building exemption may apply on an appropriately zoned, actively agricultural parcel of at least 5 acres when the non-habitable agricultural structure is at least 60 ft. from property lines and other non-exempt structures, is no more than two stories, and meets the County's structural and utility conditions; an exemption application is required.