San Mateo County, CA
Planning and Building
How permitting works in California
California counties play a massive administrative role, as they are legally required by the state to enforce the California Building Standards Code in all unincorporated territories. The county must maintain a fully staffed building department capable of reviewing plans and performing inspections for everything from single-family homes to large-scale agricultural and commercial projects.
Mandatory enforcement by every City and County.
Contact Information
- Phone
- (650) 599-7310
- Office Hours
- Monday - Thursday: 8:00 am - 4:00 pm (closed 12:00 pm - 1:00 pm for lunch) Friday - Sunday: Closed
- Website
- https://www.smcgov.org/
- Permit Portal
- https://www.smcgov.org/planning
Start your building project in San Mateo County, CA
Permit Saige will guide you step-by-step through the application process.
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