Planning, Building & Environmental Services
Building & Safety
Official county building permit guidance. Service boundaries and project requirements must be confirmed with the department.
Source checked October 14, 2026
Napa County · Napa County — building permit process (opens in a new tab)
Official page text containing: Building Permit Process
Loading Skip to Main Content How Do I? Government Departments Services Search Back to County Home /QuickLinks.aspx Building Permit Process Online Permit Center: Getting Started Online Permit Center Building Forms and Checklists AB 2533 Submittal Checklist Residential New Checklist Fees & Payments Building Inspection Building Plan Review Permit Alterations and Extensions Accessory Dwelling Units (ADUs) Rebuilding After Fire Public Records Search Email the Building Division Temporary Certificate
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Official permitting resource linked by the department. Check the available permit types and application instructions before starting.
Source checked October 14, 2026
Napa County · Napa County — building permit process (opens in a new tab)
Official page text containing: Online Permit Center: Getting Started
n Content How Do I? Government Departments Services Search Back to County Home /QuickLinks.aspx Building Permit Process Online Permit Center: Getting Started Online Permit Center Building Forms and Checklists AB 2533 Submittal Checklist Residential New Checklist Fees & Payments Building Inspection Building Plan Review Permit Alterations and Extensions Accessory Dwelling Units (ADUs) Rebuilding After Fire Public Records Search Email the Building Division Temporary Certificate of Occupancy Procedures Home Departme
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Official property research or mapping resource linked from the permit information. Use the department to confirm jurisdiction and project requirements.
Source checked October 14, 2026
Napa County · Napa County — building permit process (opens in a new tab)
Official page text containing: Napa County Public Map
the unincorporated areas of Napa County. To determine if your property is in the unincorporated County, you can use the Napa County Public Map to look up information about your property with either the address or Assessor Parcel Number (APN). Note: building permits for properties in cities and towns are handled by those jurisdictions directly. Determine if your project requires a permit. Most work does require a permit, visit Codes (ca.gov) for new 2025 California Building Standards Codes. Step 2:
Saved evidence: 0fc3619e9e5205b1 · Agent source review