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City of Alton (IL)

Illinois Authority Having Jurisdiction Solar permitting requirements
NEC Code Version2020
Fire Code Version2018 Building Code
Wet Stamps RequiredDigital Structural,Digital Electrical
Fire Setback Enforced1

Codes

NEC Code Version
2020
Fire Code Version
2018 Building Code
Code List

2021 ICC INTERNATIONAL BUILDING CODE

2021 ICC INTERNATIONAL EXISTING BUILDING CODE

2021 ICC INTERNATIONAL FIRE CODE

2021 APPENDIX B, D D OF THE INTERNATIONAL FIRE CODE

2021 APPENDIX 8 OF THE INTERNATIONAL FIRE CODE

2021 APPENDIX K OF THE INTERNATIONAL FIRE CODE

2021 ICC INTERNATIONAL MECHANICAL CODE

2021 ICC INTERNATIONAL PROPERTY MAINTENENCE CODE

2021 ICC INTERNATIONAL RESIDENTIAL CODE

2015 NFPA LIFE SAFETY CODE

2014 ILLNOIS PLUMBING CODE

2020 NATIONAL ELECTRIC CODE

IEBC Accepted
1
ASCE Code Specification
ASCE 7-16

SolarAPP+ & submittal

How Many Plansets Required
1
Revision Required
1
Rough Inspection
None
New Planset Required For Module Swap
0

Stamps

Ee Stamp Required On SLD
Yes
Wet Stamps Required
Digital Structural,Digital Electrical
Structural Calculations Required
Yes
Stamp Location On Plans
Unspecified
Date On Stamps
Expiration Date

Fire setbacks

Fire Setback Enforced
1
Setback Notes

Only fire access pathways are required.

Structural & loads

Wind Speed
115
Snow Load
30
Reducible Snow Load Allowed
1
Max Attachment Spacing
96
Structural Notes

Standard

Minimum Ground On Roof
#10

Electrical

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

Battery / ESS

Unique Battery Placards Needed
0
ESS Notes

Standard

Separate ESS Disconnect Required
ESS Disconnect
ESS Elevation Detail Required
No

Plan set

Custom Placards Required
0

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 Alton (IL) 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.