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City of Napa (CA)

California Authority Having Jurisdiction Solar permitting requirements
NEC Code Version2023
Fire Code Version2018 Building Code
SolarAPP+ StatusTargeted
Wet Stamps RequiredNone
Fire Setback Enforced1

Codes

NEC Code Version
2023
Fire Code Version
2018 Building Code
Code List

2025 CALIFORNIA BUILDING CODE

2025 CALIFORNIA ELECTRICAL CODE

2025 CALIFORNIA FIRE CODE

2025 CALIFORNIA PLUMBING CODE

2025 CALIFORNIA MECHANICAL CODE

2025 CALIFORNIA ENERGY CODE

2025 CALIFORNIA RESIDENTIAL CODE

2025 CALIFORNIA ADMINISTRATIVE CODE

ASCE Code Specification
ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status
Targeted
Any SolarAPP+ Restrictions
1
SolarAPP+ Restrictions
MPU,Derate
How Many Plansets Required
3
Revision Required
0
Rough Inspection
None
New Planset Required For Module Swap
0

Stamps

Wet Stamps Required
None
Structural Calculations Required
Yes
Stamp Location On Plans
Unspecified
Date On Stamps
Expiration Date

Fire setbacks

Fire Setback Enforced
1
Setback Notes

Standard

Structural & loads

Wind Speed
90
Wind Notes

Exposure Category C

Snow Load
0
Reducible Snow Load Allowed
1
Max Attachment Spacing
96
Structural Notes

Standard

Minimum Ground On Roof
#10

Electrical

Electrical Load Calcs Required
Derates
Allowed POI
Meter Adapter,PV Breaker,Load Side Taps,Line Side Taps
Panel Schedule Required
Partial Home Backup
Temperature Rating
90
De Rating Ampacity
0.96

Battery / ESS

Unique Battery Placards Needed
0
ESS Notes
  • Lockable Disco within 10' of battery
Separate ESS Disconnect Required
ESS Disconnect
ESS Elevation Detail Required
No

Plan set

Plan Set Requirements


Site


Roof Plan
  • Conduit run must not cross ridge or fire path
  • Illustrate full conduit run on roof
Electrical Diagram


Electrical Diagram Notes

"Pursuant to CRC section R328, ESS units shall have a minimum 3' separation between units and located 3' from exterior doors and windows directly entering the dwelling unit"

Custom Placards Required
1

Ground mount

Ground Mount Fencing Required
Mesh/Scrim
Compiled from public records, 2026. Requirements change with code cycles and local amendments. Verify with the City of Napa (CA) building department before you rely on this, and treat it as a research head start, not a ruling. Getting quotes? Run them through the quote checker first.