Planning, Building & Environmental Services
Building permits for unincorporated Napa County. Properties in cities and towns use their own jurisdictions.
Official county building permit guidance. Service boundaries and project requirements must be confirmed with the department.
How to get started
- Confirm which county or city agency handles the property before applying.
- Review the official requirements for your project and use the published application channel.
Before you start · 2 requirements & conditions
- Information & documents · Building permit applications
- Effective January 1, 2024, All Building Permit Applications will be handled digitally through the Online Permit Center.
Source & saved evidence
Napa County · Napa County — building permit process (opens in a new tab)
Official page text containing: Effective January 1, 2024, All Building Permit Applications will be handled digitally through the Online Permit Center.
Effective January 1, 2024, All Building Permit Applications will be handled digitally through the Online Permit Center.
Agent source review: October 14, 2026 · Snapshot
0fc3619e9e5205b1 - Information & documents · Project documents
- If Document Files are required to be provided for your project type, the document files must comply with Napa County’s Electronic Submittal Standards. NOTE: Failure to attach required documents in the required format will cause your application to be delayed or rejected.
Source & saved evidence
Napa County · Napa County — building permit process (opens in a new tab)
Official page text containing: If Document Files are required to be provided for your project type, the document files must comply with Napa County’s E
If Document Files are required to be provided for your project type, the document files must comply with Napa County’s Electronic Submittal Standards. NOTE: Failure to attach required documents in the required format will cause your application to be delayed or rejected.
Agent source review: October 14, 2026 · Snapshot
0fc3619e9e5205b1
Source & saved evidence
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
Agent source review: October 14, 2026 · Snapshot 0fc3619e9e5205b1
Official permitting resource linked by the department. Check the available permit types and application instructions before starting.
How to get started
- Confirm which county or city agency handles the property before applying.
- Review the official requirements for your project and use the published application channel.
Source & saved evidence
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
Agent source review: October 14, 2026 · Snapshot 0fc3619e9e5205b1
Official property research or mapping resource linked from the permit information. Use the department to confirm jurisdiction and project requirements.
How to get started
- Confirm which county or city agency handles the property before applying.
- Review the official requirements for your project and use the published application channel.
Source & saved evidence
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:
Agent source review: October 14, 2026 · Snapshot 0fc3619e9e5205b1