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City of La Mesa (CA)

California Authority Having Jurisdiction Solar permitting requirements
NEC Code Version2023
Fire Code Version2018 Building Code
SolarAPP+ StatusPiloting
Wet Stamps RequiredDigital Structural
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

IEBC Accepted
1
ASCE Code Specification
ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status
Piloting
Date SolarAPP+ Accepted
45210
Any SolarAPP+ Restrictions
0
How Many Plansets Required
3
Revision Required
1
Rough Inspection
Fire Inspection
New Planset Required For Module Swap
1

Stamps

Ee Stamp Required On SLD
No
Wet Stamps Required
Digital Structural
Structural Calculations Required
Yes
Stamp Location On Plans
Center
Date On Stamps
Expiration Date

Fire setbacks

Fire Setback Enforced
1
Setback Notes

Indicate the point of access on the front of the house and the back of the house.

Structural & loads

Wind Speed
95
Wind Notes

Exposure Category C

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

SE digital stamps on corresponding PV pages & PE Letter / Calcs. WS: 95 MPH Exposure Category C Leave a space in the top corner for the AHJ approval. PE stamps should be more centered on the page.

Minimum Ground On Roof
#10

Electrical

Electrical Load Calcs Required
Derates
Allowed POI
PV Breaker,Load Side Taps,Line Side Taps,Meter Adapter
Panel Schedule Required
Partial Home Backup
Temperature Rating
90
De Rating Ampacity
1

Battery / ESS

Unique Battery Placards Needed
0
ESS Notes
  • Provide ESS disconnecting means within sight of ESS per CEC 706.15A(2). Provide disconnecting means within sight of inverter per CEC 422.31(A)
  • Provide attachment detail of ESS to the wall. Attachments showing at least 3 or 4 screws (1/4” screws) are adequate

ESS disconnect required within 6ft of MSP on same wall and not blocked by walls/gates/etc

Separate ESS Disconnect Required
ESS Disconnect
ESS Elevation Detail Required
Yes - with dimensions

Plan set

Plan Set Requirements
  • Derates require a note on the line diagram that a derate placard will be installed
  • Note required: WHERE ALTERATIONS, REPAIRS OR ADDITIONS REQUIRING A PERMIT OCCUR, THE INDIVIDUAL DWELLING UNIT SHALL BE VERIFIED TO HAVE OR BE EQUIPPED TO HAVE SMOKE ALARMS LOCATED AS REQUIRED FOR NEW DWELLINGS, I.E.: IN EACH SLEEPING ROOM OUTSIDE EACH SEPARATE SLEEPING AREA IN THE IMMEDIATE VICINITY OF THE BEDROOMS ON EACH ADDITIONAL STORY OF THE DWELLING
  • Specify the minimum distance between the conduits located on the roof and the roof surface. If the conduits are less than 7/8 inches (23mm) from the roof surface, a temperature adder of 60F (33C) shall be added to ambient temperatures when determining ampacity correction factors.
  • On the site placard please note on the placard Caution: Multiple Sources of Power.
  • Include the span tables for the racking/railing system
  • Provide the module compatibility list to verify the racking system has been evaluated and tested for grounding and bonding (UL2703) with the specified new solar module.
Cover Page Notes

Indicate the following on the cover sheet: * Building type of construction (usually VB). * Occupancy group(s) of dwelling and garage (R3 & U) * Indicate (yes or no) if this structure is equipped or will be equipped with an automatic fire sprinkler system * Provide the wind and seismic design criteria on the drawings. Specify the wind speed and exposure category.

Site Notes

Emergency escape and rescue opening. Panels and modules installed on dwellings shall not be placed on the portion of a roof that is below an emergency escape and rescue opening. A 36-inch-wide pathway shall be provided to the emergency escape and rescue opening. [CRC R324.6.2.2]

Electrical Diagram
  • 120% rule allowed per CEC 705.12(B)(2)(3)(d)
Electrical Diagram Notes

All Jobs [The new PV system has equal or greater AIC rating to the existing electrical system. CEC 690.13(D) // Grounding electrode conductor shall be sized per CEC 250.66.] Battery [If any existing load conductors are extended more than 6’, AFCI protection will need to be provided per 210.12(D) // Where interconnection is done via PV breaker, the PV breaker shall be located at the opposite end of the busbar from the main breaker // New electrical shall be located at least three (3) feet from gas meter or gas shutoff valves.]

Label Page Notes
  • For ESS: House Placard should read - 'CAUTION: MULTIPLE SOURCES OF POWER'
Custom Placards Required
1
Placards Notes

On the site placard please note on the placard “Caution: Multiple Sources of Power.”

Ground mount

Ground Mount Fencing Required
Situational
Ground Mount Notes

Do you require additional fencing around ground-mounted solar arrays? Case by Case yes it is required, show your dimensions on your site plan.

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