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County of St. Charles (MO)

Missouri 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 INTERNATIONAL BUILDING CODE

2021 INTERNATIONAL RESIDENTIAL CODE

2021 INTERNATIONAL FIRE CODE

2021 INTERNATIONAL ENERGY CONSERVATION CODE

2021 INTERNATIONAL EXISTING BUILDING CODE

2021 INTERNATIONAL FUEL GAS CODE

2021 INTERNATIONAL MECHANICAL CODE

2021 INTERNATIONAL PLUMBING CODE

2020 NATIONAL ELECTRICAL CODE

IEBC Accepted
1
ASCE Code Specification
ASCE 7-16

SolarAPP+ & submittal

Revision Required
0
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

Structural & loads

Wind Speed
115
Snow Load
20
Reducible Snow Load Allowed
1
Max Attachment Spacing
96
Structural Notes
  1. Required - SEALED PLANS REQUIRED: Solar photovoltaic plans both structural and electrical pages must be signed, dated and sealed by a MO professional engineer. Please resubmit plans with either all pages individually sealed or the cover sheet referencing all pages sealed.
  2. Required - SEALED PLANS REQUIRED: Solar panels installed on an existing structure need to have the structure examined by a professional engineer and a signed and sealed structural analysis reported provided. The cover page listing all pages or all separate pages with details of the project must be signed and sealed by a MO professional engineer.
Minimum Ground On Roof
#10

Electrical

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

Battery / ESS

Unique Battery Placards Needed
0
Separate ESS Disconnect Required
No
ESS Elevation Detail Required
No

Plan set

Label Page

Please make sure placard on label page reflect 2014 stickers

Custom Placards Required
1
Placards Notes

Site map placard required.

Ground mount

Ground Mount Fencing Required
No
Setback Front Yard
10
Setback Back Yard
5
Setback Side Yard
5
Compiled from public records, 2026. Requirements change with code cycles and local amendments. Verify with the County of St. Charles (MO) 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.