County government
Planning, Building & Environmental Services
Building permits for unincorporated Napa County. Properties in cities and towns use their own jurisdictions.
Building Inspection (opens in a new tab)Official instructions
Official building inspection information. Confirm the request method, permit details and inspection timing 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.
Source & saved evidence
Napa County · Napa County — building permit process (opens in a new tab)
Official page text containing: Building Inspection
nline 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 Departments Planning, Building & Environmental Services Building Division Building Permit Process Building Permit Process Effective January 1, 2024,
Agent source review: October 14, 2026 · Snapshot 0fc3619e9e5205b1