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Department Contact Information (click here) Office Hours Monday - Friday 7:30 AM - 5:00 PM Counter Hours - Building Division Monday - Friday 9:00 AM - 11:30 PM 1:00 PM - 3:30 PM Phone: 707-253-4417 Fax: 707-253-4545 Location 1195 Third Street, 2nd Floor Napa, CA 94559 Schedule an Inspection:Please review the scheduling inspection section on how to use the automated phone system to schedule your inspection.