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City of Naperville (IL)

Illinois Authority Having Jurisdiction Solar permitting requirements
NEC Code Version2017
Fire Code Version2018 Building Code
SolarAPP+ StatusTargeted
Wet Stamps RequiredDigital Structural
Fire Setback Enforced1

Codes

NEC Code Version
2017
Fire Code Version
2018 Building Code
Code List

2018 INTERNATIONAL BUILDING CODE

2018 INTERNATIONAL RESIDENTIAL CODE

2018 INTERNATIONAL PROPERTY MAINTENANCE CODE

2018 INTERNATIONAL FIRE CODE

2018 INTERNATIONAL FUEL GAS CODE

2018 INTERNATIONAL MECHANICAL CODE

2018 INTERNATIONAL PLUMBING CODE

2018 INTERNATIONAL EXISTING BUILDING CODE

2018 INTERNATIONAL SWIMMING POOL AND SPA CODE

2017 NATIONAL ELECTRIC CODE (NFPA 70)

IEBC Accepted
1
ASCE Code Specification
ASCE 7-16

SolarAPP+ & submittal

SolarAPP+ Status
Targeted
Any SolarAPP+ Restrictions
1
SolarAPP+ Restrictions
MPU,Derate
How Many Plansets Required
Other (See Submission Notes)
Revision Required
1
New Planset Required For Module Swap
0

Stamps

Wet Stamps Required
Digital Structural
Structural Calculations Required
Yes
Stamp Location On Plans
Unspecified
Date On Stamps
Expiration Date

Fire setbacks

Fire Setback Enforced
1
Setback Notes

Residential Group R-3 (permanent residential occupants): -Not fewer than two 36 inches wide pathways on separate roof planes, from lowest roof edge to ridge ; not fewer than one pathway shall be on the street or driveway side of the roof. For each roof plane with an array, not fewer than one 36 inches wide pathway shall be provided on the same roof plane as the array, on an adjacent roof plane, or straddling the same and adjacent roof planes. 2018 IFC 1204.2.1 -For arrays occupying 33% or less of the plan view total roof area, a setback of not less than 18 inches wide is required on both sides of a horizontal ridge (greater than 33% requires 36 inches wide on both sides). Alternatives exist for sprinklered structures.

Structural & loads

Wind Speed
115
Wind Notes

3 second gust

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

Needs Load Clacs - Excel sheet is attached.

Minimum Ground On Roof
#10

Electrical

Electrical Load Calcs Required
Derates
Allowed POI
Load Side Taps,PV Breaker,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

Standard

Separate ESS Disconnect Required
ESS Disconnect
ESS Elevation Detail Required
No

Plan set

Plan Set Requirements

Needs Load Clacs - Excel sheet is attached., Line side taps only permitted Line side taps are only permitted while using Milbank dual channel lugs, Polaris taps, or Burndy blocks

Cover Page

Callout on Cover Page:

Windspeed - 115 mph nominal for 3 second gust

Snow load - 30 psf

Roof Plan

* Indicate the number of existing roofing layers and estimated date of last roofing installation * Indicate fire classification rating of proposed solar panels. (2018 IRC R902, 2018 IBC 3111.3.2)

Electrical Diagram

Line side taps are only permitted while using Milbank dual channel lugs, Polaris taps, or Burndy blocks

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 Naperville (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.