City of Decatur (IL)

Illinois Authority Having Jurisdiction Solar permitting requirements

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NEC Code Version2017
Fire Code Version2015 Building Code
SolarAPP+ StatusTargeted
Wet Stamps RequiredDigital Structural
Fire Setback EnforcedYes

Codes

NEC Code Version
2017
Fire Code Version
2015 Building Code
Code List

2017 NATIONAL ELECTRICAL CODE

2021 INTERNATIONAL BUILDING CODE

2021 INTERNATIONAL EXISTING BUILDING CODE

2021 INTERNATIONAL ENERGY CONSERVATION CODE

2021 INTERNATIONAL RESIDENTIAL CODE

2024 INTERNATIONAL BUILDING CODE

ASCE Code Specification
ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status
Targeted
Any SolarAPP+ Restrictions
Yes
SolarAPP+ Restrictions
MPU,Derate
How Many Plansets Required
1
Revision Required
Yes
Rough Inspection
None
New Planset Required For Module Swap
No

Stamps

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

Fire setbacks

Fire Setback Enforced
Yes
Setback Notes

Standard

Structural & loads

Wind Speed
85
Snow Load
999
Reducible Snow Load Allowed
Yes
Max Attachment Spacing
96
Structural Notes

Add Ground Snow and wind speed to calcs

Minimum Ground On Roof
#10

Electrical

Electrical Load Calcs Required
Derates
Allowed POI
Load Side Taps,PV Breaker,Meter Adapter,Line Side Taps
Panel Schedule Required
Partial Home Backup
Temperature Rating
75
De Rating Ampacity
0.91
BOS Restrictions
  • 312.5 c each cable requires clamp. unless all exceptions are met (all circuits need to be ran in their own conduit coming into the MSP)

Battery / ESS

Unique Battery Placards Needed
No
ESS Notes
  • Remote disconnect required per 597167 when battery is located at back of home.
  • AHJ inspector enforcing 3ft battery setbacks from openings/doors/windows.
  • If 100A Main Breaker feeds to GW3, use #3 awg, #6 EGC in 1-1/4" conduit.


Separate ESS Disconnect Required
ESS Disconnect
ESS Elevation Detail Required
No

Plan set

Site


Site Notes

All Jobs [Contractor shall verify smoke detection and CO detection meets State of Illinois law, or install per IRC 314 & 315.]

Electrical Diagram

All Jobs [3ft battery setbacks required from openings/doors/windows.]

Custom Placards Required
No

Ground mount

Ground Mount Fencing Required
No
Compiled from public records, 2026. Requirements change with code cycles and local amendments. Verify with the City of Decatur (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.