St. Charles County, MO Building Safety: Electrical Permits (2026)
Key Facts
- Adopted code
- 2020 NFPA 70 National Electrical Code
- Residential permit fee
- $60 or cost x multiplier, greater
- Mobile/manufactured home fee
- $60 flat
- Commercial permit fee
- $80 or cost x multiplier, greater
- Violation penalty
- Up to $500, each day separate
- Appeal fee
- $100 to Building Commission, 20 days
- Stop-work order penalty
- Up to $250
Summary
St. Charles County adopts the 2020 National Electrical Code (NFPA 70) as its Electric Code under Code Section 500.260, with local amendments on GFCI, AFCI and tamper-resistant receptacle protection. The Division of Building and Code Enforcement issues electrical permits under Code Section 505.020(D)(1)(b), charging sixty dollars for residential work, sixty dollars flat for a single- or double-wide mobile or manufactured home, and eighty dollars for commercial work.
St. Charles County hereby adopts the 2020 National Fire Protection Association 70 — National Electric Code, a copy of which shall be deposited in the Office of the County Registrar with this ordinance... 90.1(D) Administration of this code. The administration of this code shall be in accordance with Appendix K "Administrative Provisions" of the Building Code adopted in Section 500.100. ... [Section 505.020(D)(1)] The Division of Building and Code Enforcement shall charge the following fees for permits issued under the Electrical Code, Section 500.260 of this Title: (1) Sixty dollars ($60.00) or the estimated cost of construction multiplied by the "Permit Fee Multiplier"... whichever is greater, for residential construction. (2) Sixty dollars ($60.00) for a single- or double-wide mobile home or manufactured home. (3) Eighty dollars ($80.00) or the estimated cost of construction multiplied by the "Permit Fee Multiplier"... whichever is greater, for commercial construction.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4863880; v61 updated 2026-05-11; through 05-11-2026).
Full Breakdown
The Electric Code of St. 260 (Ord. No. 17-061 Section 7, 7-5-2017, most recently amended by Ord. No. 25-085, 12-15-2025), incorporates the 2020 edition of NFPA 70 with county-specific changes. 100, so permit issuance, appeals and enforcement for electrical work run through that shared framework rather than a standalone electrical chapter. 12 in dwellings, child-care facilities, schools, clinics and assisted-living facilities. 85, Emergency Disconnects, is deleted outright, so the county does not impose that NEC requirement. 020(D)(1)(b): sixty dollars for residential electrical work or the estimated construction cost times the annually recalculated Permit Fee Multiplier, whichever is greater; a flat sixty dollars for a single- or double-wide mobile or manufactured home; and eighty dollars, or the multiplier calculation, for commercial work.
The Director of the Division of Building and Code Enforcement computes that multiplier every year and must post it at the Division office and on the county website by January 30. 100, a permit applicant may appeal a Building Official interpretation to the County Building Commission for a one-hundred-dollar filing fee within twenty days of notice.
Violations & Fines
Electrical work performed without a permit, or in violation of approved construction documents or a Building Official directive, is a misdemeanor under the Appendix K provisions incorporated at Code Section 500.100, Section 114.4, punishable by a fine of up to five hundred dollars, with each day the violation continues counted as a separate offense. If the Building Official issues a written stop-work order under Section 115.2, the person served must also pay an administrative penalty of up to two hundred fifty dollars before work may resume.
Frequently Asked Questions
Does St. Charles County require a permit for electrical work?
How much does an electrical permit cost in St. Charles County?
What happens if I do electrical work without a permit in St. Charles County?
Does St. Charles County require GFCI and AFCI protection in homes?
Sources & Official References
Other rules in St. Charles County
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