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Engineering & Construction Division
Building
The Building Division reviews and inspects construction projects to ensure they are built according to the approved plans and building codes.
The best way to reach staff is via email.
Building Inspection
Inspection Scheduling, Cancellation, Time Estimates, and Results
- Email: PermitSonoma-BuildingInspection@sonoma-county.org
- Phone: (707) 565-1900, Option #3
- Inspection Scheduling
Building Plan Check
Reviews construction plans prior to issuance of a building permit to ensure the project will conform to the uniform construction codes (building, electrical, plumbing, and mechanical) and sound engineering practices.
- Email: PermitSonoma-PlanCheck@sonoma-county.org
- Phone: (707) 565-2095
- Fax: (707) 565-2210
- Building Plan Check Response Times
Engineering & Water Resources
The best way to reach staff is via email.
Engineering Inspection Scheduling
Inspection scheduling for Road Improvements and Encroachments, Grading and Storm Water, Sanitation Sewers
- Phone: (707) 565-3551 (Automated System)
- Fax: (707) 565-1103
- Inspection Scheduling
Grading, Drainage, & Storm Water
Grading, Drainage, & Storm Water ensures that construction and grading do not cause flooding. Grading is the excavation (cuts) and placement (fill) of earth material by artificial means. Storm water is any storm water runoff, snow melt, or surface runoff.
- Email: PermitSonoma-Engineering@sonoma-county.org
- Phone: (707) 565-2268
- Fax: (707) 565-1103
Road Encroachment
Encroachment permits for work in public roads for new driveway or utility installation.
- Email: PermitSonoma-Engineering@sonoma-county.org
- Phone: (707) 565-2268
- Fax: (707) 565-3313
Road Improvement Plan Review
Reviews improvement plans (roads, utilities, etc.) for new developments.
- Email: PermitSonoma-Engineering@sonoma-county.org
- Phone: (707) 565-3714
- Fax: (707) 565-1103
Sanitation Sewer
A sanitary sewer system collects and transports waste from indoor plumbing fixtures via public sewer to treatment plants.
- Email: PermitSonoma-Sanitation@sonoma-county.org
- Phone: (707) 565-2268
- Fax: (707) 565-1103
Special Events
Special Events and Cultural Events are periodic special events which attract a large gathering of people. Depending on the nature of your event, you may need to obtain permits or approvals to ensure a well-planned, safe event.
- Email: PermitSonoma-SpecialEvents@sonoma-county.org
- Phone: (707) 565-2268
Survey and Land Development (County Surveyor)
Reviews all subdivision and survey maps before recordation.
- Email: PermitSonoma-Survey@sonoma-county.org
- Phone: (707) 565-2469
- Fax: (707) 565-1103
Transportation Permits
Issues permits to operate or move vehicle(s) or special mobile equipment on County roads of a size or weight of vehicle or load exceeding the maximum limitations specified in the California Vehicle Code.
- Email: PermitSonoma-Transportation@sonoma-county.org
- Phone: (707) 565-5279
- Fax: (707) 565-3313
Reviews all development proposals utilizing wells or septic systems and reviews permit applications for septic system repair or upgrade. Their focus is on protecting health by ensuring that water wells are properly constructed and septic systems protect surface and ground water quality.
The best way to reach staff is via email.
- Email: PermitSonoma-Well-Septic@sonoma-county.org
- Phone: (707) 565-2849
- fax (707) 565-1399
Upcoming Events
Board of Supervisors Consideration of Revised OWTS Manual early 2023
The Board of Supervisors will be considering the revised OWTS Manual at an upcoming meeting early in 2023. With direction from the Board of Supervisors, the revised manual will be submitted to the local Regional Water Board for approval.