Jefferson County, MO Building Safety: Electrical Permits (2026)
Key Facts
- Governing code
- NEC 2014 + County Electrical Code 2017
- License term
- 3 years, Section 500.140
- Panel permit fee (residential)
- $115-$136 by amperage
- Late-start penalty
- 100% surcharge, Section 500.300.C
- Max criminal penalty
- $1,000 fine or 1 year jail
Summary
Jefferson County requires a county Electrical License before any contractor wires, installs or alters electrical service in the unincorporated area, and a building permit before work starts. The Code Official issues licenses under Section 500.140 for a three-year term to applicants who pass a master electrician exam, and the 2014 National Electrical Code applies as locally amended under Article IX plus the county's own Article X Electrical Code 2017.
The Code Official shall be and is hereby authorized to grant a license to any person, firm or corporation (hereinafter "contractor") found to be qualified to engage in the work of installing, erecting, or altering any electrical service or equipment and making service corrections on material, wiring, fixtures, machinery, and other apparatus to be used, or in use for the generation and utilization of electricity... The license shall be issued in the name of the contractor and a responsible person shall be listed. The license shall be valid for a period of three (3) years. ... No contractor shall perform electrical work or hold itself out in any advertising medium or publication as being available to perform such work unless licensed pursuant to this Section.
Full Breakdown
010 adopts the National Electrical Code 2014 Edition together with the Jefferson County Electrical Code 2017 as the governing standards for wiring, service equipment and grounding countywide. 140 sets the licensing path: an applicant must be at least twenty-one years old, work for a single employer in the contracting business, and pass a master electrician exam scoring seventy percent (70%) or better within the past six years, backed by either a college degree plus one year's field experience, six years of hands-on wiring experience, or a two-year trade-school diploma plus three years of practical work.
D bars anyone from performing or advertising electrical work without the license. 190 if they occupy the home, personally perform all the work, keep only one permit open at a time, and pass a written homeowner exam scored at least seventy-five percent (75%); the homeowner permit runs for one year. 00. 00. 8(A) for outlets in bathrooms, garages, kitchens, crawl spaces, unfinished basements, outdoor locations, and near sinks, tubs and showers.
Violations & Fines
Starting electrical work before the permit issues costs the contractor an extra penalty equal to one hundred percent (100%) of the usual permit fee, on top of the fee itself, under Section 500.300.C, and the Code Official can disconnect utility service. Anyone who violates the Building Code, including work done without or contrary to a permit, commits a misdemeanor under Section 500.300.E punishable by a fine up to $1,000.00, up to one year in jail, or both, with each day of continued violation counted as a separate offense.
Frequently Asked Questions
Does Jefferson County require a permit for electrical work?
Can a homeowner wire their own house in Jefferson County?
How much does an electrical permit cost in Jefferson County?
Sources & Official References
Other rules in Jefferson County
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