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HVAC Licensing Guide -- 2025

Missouri HVAC License Requirements

Missouri has no statewide HVAC license. St. Louis and Kansas City have their own licensing requirements.

State License Required
Varies / Local
Regulating Body
Local Jurisdictions
EPA 608 Required
Yes
License Type(s)
No State License (Major cities regulate)
Renewal Period
N/A
CE Hours
N/A

Overview

Missouri has no statewide HVAC license. St. Louis and Kansas City have their own licensing requirements.

No Statewide License -- But Local Rules Apply

Missouri does not have a statewide HVAC contractor license. However, many cities and counties require local contractor licenses, business licenses, and permits. Always check with your local building department before starting work.

What You Still Need Everywhere in Missouri

  • EPA 608 Certification -- Required federally for all refrigerant handling
  • Local Business License -- Required by most cities and counties
  • Building Permits -- Required for most HVAC installations; apply through local building department
  • General Liability Insurance -- Required by most commercial clients and advisable for all work
  • Workers Compensation -- Required if you have employees

Major City Requirements

St. Louis requires a Mechanical Contractor license. Kansas City requires registration with the city. Check with your local jurisdiction for current requirements.

EPA 608 Is Still Federal Law

Even without a state license requirement, EPA Section 608 makes it illegal to purchase refrigerant containers over 2 lbs or vent refrigerants without EPA 608 certification. Complete our free EPA 608 study course.

FAQ

Do I need any license to do HVAC work in Missouri?
No statewide HVAC license is required, but local jurisdictions often have their own requirements. Always check with your local city or county building department. You will need EPA 608 certification for refrigerant work regardless.
Can I pull permits in Missouri without a license?
Permit requirements vary by local jurisdiction in Missouri. Some areas allow homeowners to pull their own permits but require licensed contractors for commercial work. Check with your local building department for current requirements.
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