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10 permits · verified 2026-10-27

What permits do you need to open a contractor or trade in Jefferson County Mo?

In short

A contractor or trade in Jefferson County Mo, MO has 1 permit that applies to every business of this type, plus 9 more that depend on your premises, signage or how you are set up. Missouri Secretary of State, Corporations Division charges $50 filed online; $105 on paper for the articles of organization (llc). 6 of the 10 are charged as a range or formula rather than a flat fee. Verified 2026-10-27 against the issuing agencies’ published fee schedules.

Permits particular to a contractor or trade in Jefferson County Mo

Permits required, with issuing agency, fee, renewal term and the date each record was last verified against its source
County Contractor License (Plumbing, Electrical, Mechanical and Related Trades)Jefferson County Code Enforcement Division$30 nonrefundable application fee + $150 license fee on approval ($100 for soil evaluator or on-site system testing). Renewal $30; extension $30; inactive license renewal $50; reinstatement of an expired license $150.not stated on the Contractor Licenses page or the application forms2026-10-27
Statewide Electrical Contractor License (optional)only if it applies to youMissouri Office of Statewide Electrical Contractors, Division of Professional Registration$200 to open; renewal is $100 every three yearstriennial — all licenses expire together and renew on the same three-year cycle2026-09-04
General Contractor License — Missouri state position (local licensing)only if it applies to youMissouri Division of Professional RegistrationNo feeset by the city or county2026-09-04

Fees shown as a range or formula are set that way by the issuing agency — we do not average them into a single number.

Local permits that apply to every type of business in Jefferson County Mo

Permits required, with issuing agency, fee, renewal term and the date each record was last verified against its source
Zoning Approvals (Zone Change, Conditional Use, Site Development Plan)only if it applies to youJefferson County Planning DivisionVaries — formula on the Jefferson County Mo pageper application2026-10-27
Commercial Building Permitonly if it applies to youJefferson County Code Enforcement DivisionVaries — formula on the Jefferson County Mo pageper project2026-10-27
Sign Permitonly if it applies to youJefferson County Code Enforcement DivisionVaries — formula on the Jefferson County Mo pageper sign2026-10-27

Fees shown as a range or formula are set that way by the issuing agency — we do not average them into a single number.

MO registrations that apply to every type of business

Permits required, with issuing agency, fee, renewal term and the date each record was last verified against its source
Articles of Organization (LLC)only if it applies to youMissouri Secretary of State, Corporations Division$50 filed online; $105 on paperperpetual — a Missouri LLC files no annual report at all2026-09-04
Articles of Incorporationonly if it applies to youMissouri Secretary of State, Corporations DivisionVaries — formula on the MO pageperpetual, but an annual registration report is due every year2026-09-04
Corporate Annual Registration Reportonly if it applies to youMissouri Secretary of State, Corporations DivisionVaries — formula on the MO pageannual by default, due the month the corporation was formed — a two-year cycle may be elected instead, at $40 online or $90 on paper2026-09-04
General Business License — Missouri state positiononly if it applies to youMissouri Department of RevenueNo feeset by the city or county2026-09-04

Fees shown as a range or formula are set that way by the issuing agency — we do not average them into a single number.

How much does it actually cost to permit a contractor or trade in Jefferson County Mo?

There is no single figure, and any site quoting one is rounding away the part that matters. Of the 10 records listed for a contractor or trade in Jefferson County Mo, MO, 1 apply to every business of this type and 9 are conditional. Adding every fee on the page together would overstate what most operators pay, because it would include permits they never need.

6 of the 10 are charged as a range or a formula set by the issuing agency, and 2 have no fee published at all. The ones particular to this business that vary:

County Contractor License (Plumbing, Electrical, Mechanical and Related Trades): $30 nonrefundable application fee + $150 license fee on approval ($100 for soil evaluator or on-site system testing). Renewal $30; extension $30; inactive license renewal $50; reinstatement of an expired license $150.

The other 5 variable fees belong to permits that apply to every type of business here; their formulas are set out on the Jefferson County Mo permits page and the MO state page.

Which offices issue these permits in Jefferson County Mo?

Permits for a contractor or trade in Jefferson County Mo, MO come from 6 separate offices: Jefferson County Planning Division, Jefferson County Code Enforcement Division, Missouri Secretary of State, Corporations Division, Missouri Office of Statewide Electrical Contractors, Division of Professional Registration, Missouri Division of Professional Registration, Missouri Department of Revenue. No single office issues them all, which is why an opening means filing in several places rather than one.

What does a contractor or trade need in Jefferson County Mo that other businesses do not?

3 of the 3 permits particular to a contractor or trade here apply to no other business type we cover in Jefferson County Mo: County Contractor License (Plumbing, Electrical, Mechanical and Related Trades), Statewide Electrical Contractor License (optional) and General Contractor License — Missouri state position (local licensing).

County Contractor License (Plumbing, Electrical, Mechanical and Related Trades)

The county's Contractor Licenses page states: "The Code Official is authorized to grant a license to any contractor, firm or corporation found to be qualified to engage in certain work," and lists licenses for plumbing, electrical, electrical communication, mechanical, sprinkler fitter, lawn irrigation, on-site sewer installer and designer, and soil evaluator contractors. Ordinance 21-0356, §500.250(A)(16), sets a $150 license fee ($100 for soil evaluator or on-site system testing), a $30 nonrefundable application fee, $30 renewal and extension fees, a $50 inactive renewal and $150 to reinstate an expired license. The plumbing, electrical and mechanical application forms each require a $25,000 license and permit bond naming the county, a liability insurance certificate of $1,000,000 aggregate and $250,000 per occurrence, and a passing master exam score of at least 70% within the past six years.

Statewide Electrical Contractor License (optional)

This license exists to solve one specific problem and nothing more: a contractor working across several Missouri jurisdictions no longer needs a separate local electrical license in each one, because state law obliges every city and county to recognise this statewide credential in place of its own. It does not abolish local licensing — a city may keep issuing its own electrical contractor license to everyone else, keep requiring a business license, keep issuing permits and inspecting work, and keep licensing individual electricians on its own examination, all in parallel with this statewide option. The state gives that recognition rule real teeth: a political subdivision that refuses to honour a statewide license risks having its own share of state sales tax withheld until it complies. Two hundred dollars to obtain it and $100 to renew, on a shared three-year cycle rather than one tied to the individual holder.

General Contractor License — Missouri state position (local licensing)

The Division of Professional Registration's own list of every board it administers includes Electrical Contractors but has no general contractor, plumbing or HVAC board, so there is no state fee for any of those three licenses. Plumbing licensing is confined by statute to cities of 15,000 people or more and to first-class counties, each running its own board of examiners and its own local code, and HVAC work is regulated only where a city chooses to license it. A contractor working across several Missouri municipalities may need a separate local license in each one for these trades. Electrical work is the exception — see the statewide electrical contractor record.

The other 3 local permits in the tables apply to every type of business in Jefferson County Mo, MO; what each one involves is set out on the Jefferson County Mo permits page. The 4 state-level registrations apply to every type of business across MO and are covered on the MO state page.

How does a contractor or trade compare with other businesses in Jefferson County Mo?

The closest match is a auto repair shop, which shares 0 of these permits. A contractor or trade also needs County Contractor License (Plumbing, Electrical, Mechanical and Related Trades), Statewide Electrical Contractor License (optional) and General Contractor License — Missouri state position (local licensing). A auto repair shop needs Automotive Repair Shop License — Missouri state position, Salvage Business License (rebuilder or body shop) and Motor Vehicle Safety Inspection Station Permit, which a contractor or trade does not.

Permits particular to each business type in Jefferson County Mo, MO, compared with a contractor or trade
BusinessIts own permitsShared with a contractor or tradeOnly a contractor or trade needsOnly it needs
Auto repair shops3033
Childcare centres2032
Coffee shops5035
Fitness studios0030
Food trucks4034
Restaurants5035
Retail stores2032
Salons and barbers1031
Veterinary clinics1031

Sources

Every figure for the permits explained on this page was read from one of these government pages on the date shown. Sources for the permits that apply to every type of business are listed on the Jefferson County Mo permits page and the MO state page. Confirmed by Editorial Team.

  1. Ordinance 21-0356 (Bill 21-0707): Amending Section 500.250 Fee ScheduleJefferson County, Missouri · primary source · retrieved 2026-10-27
  2. Contractor LicensesJefferson County, Missouri · primary source · retrieved 2026-10-27
  3. Plumbing Contractor License ApplicationJefferson County, Missouri · primary source · retrieved 2026-10-27
  4. Electrical Contractor License ApplicationJefferson County, Missouri · primary source · retrieved 2026-10-27
  5. Mechanical Contractor License ApplicationJefferson County, Missouri · primary source · retrieved 2026-10-27
  6. Office of Statewide Electrical Contractors — fee schedule effective 30 June 2019Missouri Office of Statewide Electrical Contractors · primary source · retrieved 2026-09-04
  7. Office of Statewide Electrical Contractors — FAQ for political subdivisions, explaining the preemption and recognition ruleMissouri Office of Statewide Electrical Contractors · primary source · retrieved 2026-09-04
  8. Missouri Division of Professional Registration — the complete list of every board it administers, containing no HVAC or mechanical contractor boardMissouri Division of Professional Registration · primary source · retrieved 2026-09-04
  9. Missouri Revised Statutes chapter 341 — plumbers and plumbing, licensed only in cities of 15,000 or more and first-class countiesMissouri General Assembly, Office of the Revisor of Statutes · primary source · retrieved 2026-09-04

Related

Commercial Compliance Hub publishes information, not legal advice. Requirements change — confirm anything you rely on with the issuing agency before you file.