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County of Dekalb (IL)

Illinois Authority Having Jurisdiction Solar permitting requirements
NEC Code Version2020
Wet Stamps RequiredDigital Structural
Fire Setback Enforced0

Codes

NEC Code Version
2020
Code List

2021 INTERNATIONAL RESIDENTIAL CODE

2021 INTERNATIONAL MECHANICAL CODE

2021 INTERNATIONAL FUEL GAS CODE

2020 NATIONAL ELECTRICAL CODE

2014 ILLINOIS STATE PLUMBING CODE

2021 IECC - ILLINOIS STATE ENERGY CONSERVATION CODE

IEBC Accepted
1
ASCE Code Specification
ASCE 7-16

SolarAPP+ & submittal

How Many Plansets Required
2
Revision Required
0
New Planset Required For Module Swap
0

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
0
Setback Notes

Standard

Structural & loads

Wind Speed
90
Wind Notes

Exposure Category B

Snow Load
30
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
PV Breaker,Line Side Taps,Meter Adapter,Load Side Taps
Panel Schedule Required
Partial Home Backup
Temperature Rating
90
De Rating Ampacity
1

Battery / ESS

Unique Battery Placards Needed
0
ESS Notes

Standard

Separate ESS Disconnect Required
ESS Disconnect
ESS Elevation Detail Required
No

Plan set

Electrical Diagram

Standard

Custom Placards Required
0

Ground mount

Ground Mount Fencing Required
No
Ground Mount Notes

Setback Requirements 1). Set back requirements for all SES shall meet the structure minimum set back requirements when the SES is oriented at any & all positions. 2). No SES shall be allowed in the front yard of any residentially used or zoned property. 3). Roof mounted SES shall not extend beyond the exterior perimeter of the building on which the system is mounted. 4). The solar array and all components of the solar collector system in a Solar Farm shall be kept at least one hundred (100) feet from a property line or right-of-way. However, this requirement may be waived, provided the solar farm’s owner/lessee obtains, and records with the DeKalb County Recorder, signed and notarized affidavits, agreeing that the required minimum setback be waived, from all property owners and affected road authorities adjoining the zoning lot on which the solar farm is to be located (as determined by DeKalb County Community Development Department). However, in no instance shall any part of a solar farm, be located within fifty (50) feet of any of the aforementioned items. Ground screws allowed with engineering. Frost depth: 42" Septic Documentation: Health Department

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