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City of Cupertino (CA)

California Authority Having Jurisdiction Solar permitting requirements
NEC Code Version2023
Fire Code Version2018 Building Code
SolarAPP+ StatusAdopted
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
Adopted
Any SolarAPP+ Restrictions
1
SolarAPP+ Restrictions
Existing Systems,Trenching
How Many Plansets Required
1
Revision Required
1
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
110
Wind Notes

Exposure Category B

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

Yes, if the existing roof framing does not comply with the 2016 California Residential Code.

Minimum Ground On Roof
#10

Electrical

Electrical Load Calcs Required
Derates
Allowed POI
Line Side Taps,PV Breaker,Load Side Taps,Meter Adapter
Panel Schedule Required
Partial Home Backup
Temperature Rating
90
De Rating Ampacity
0.91

Battery / ESS

Unique Battery Placards Needed
0
ESS Notes

Show that the proposed batteries are at least 3 feet spacing and 3 feet from doors and windows directly entering the dwelling unit


For H-Frame locations:

Separate ESS Disconnect Required
ESS Disconnect
ESS Elevation Detail Required
Yes

Plan set

Attachment Detail

Provide flashing method. If a proprietary product is used, please show it on the detail and provide specification for the product

Electrical Diagram

Single line diagram for simple residential and 3-line diagram for commercial. If you meet code requirements regarding the 120% rule then you are good. If you exceed the code requirement then electrical engineering calculation is required.

Custom Placards Required
1
Non Standard Planset Requirements
Single Line Diagram

Ground mount

Ground Mount Fencing Required
Yes
Ground Mount Notes

Building department do have such requirement. Might want to verify with Planning Department.

Compiled from public records, 2026. Requirements change with code cycles and local amendments. Verify with the City of Cupertino (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.