Building Permits in Napa, California
City in Napa County
Verified August 2026
Adopted Construction Codes
These are the state-level code editions for California. They apply in Napaunless a verified local adoption or amendment is noted — in local-adoption states, confirm the city or county's own code editions with the building department.
Permit Requirements
building permit
Fees, required documents and the inspection sequence is available to BuildSpec members. Sign inShow fees — free trial
Building Department
Apply online — Napa permit portal ↗
Permit fee schedule ↗ · fee schedule checked August 2026
Building permit fees are base fee plus per-square-foot tiers; plan review equals 33% of the permit fee.
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