Sonoma County, CA Building Safety: Building Permits (2026)
Key Facts
- Governing section
- Sonoma County Code § 7-5
- Enforcing agency
- Permit and Resource Management Department
- Emergency repairs
- Notify PRMD by next-day noon
- Permit scope
- Separate permit per structure
- Agricultural exemption
- Available under Sec. 7-7
Summary
Unincorporated Sonoma County requires a separate building permit for every building or structure that is erected, enlarged, altered, repaired, moved, converted, or demolished, issued by the Permit and Resource Management Department under County Code Section 7-5.
No person, firm or corporation shall erect, construct, enlarge, alter, repair, move, improve, convert or demolish any building or structure in the unincorporated area of this county, or cause the same to be done, without first obtaining a separate building permit for each such building or structure as required by this chapter. Permits shall be issued and fees shall be collected by the permit and resource management department.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 64 Update 2).
Full Breakdown
Sonoma County Code Section 7-5 bars anyone from erecting, enlarging, altering, repairing, moving, converting, or demolishing a building or structure in the unincorporated county without a separate permit for each structure, issued and fee-collected by the Permit and Resource Management Department (PRMD). Permits must clear zoning review under Chapters 26 or 26C, grading and drainage requirements under Chapter 11, and stormwater requirements under Chapter 11A before issuance, and work tied to septic systems, water supply, or food facilities needs separate written approval from the well and septic section or county health officer. Emergency repairs can start before permitting if PRMD is notified by noon the next business day and the permit follows within 24 hours.
Violations & Fines
Building without a required permit is a code violation enforced by PRMD, subjecting owners to stop-work orders, added fees, and mandatory retroactive permitting before work continues.
Frequently Asked Questions
Does Sonoma County require a permit to build a shed or addition on unincorporated land?
Can I start emergency repairs before getting a permit?
Are there exemptions from Sonoma County's building permit requirement?
Sources & Official References
Other rules in Sonoma County
California rules heatmap·Compare Sonoma County to another location·View the California building safety overview
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