HVAC Contractor Permit Requirements in St. Louis, MO
Complete permit and license guide for starting a hvac contractor in St. Louis, St. Louis City County, Missouri.
Not legal advice. Requirements may change — always verify with your local government authority before applying. Last verified: .
St. Louis / St. Louis City County Requirements
1 requirementCity of St. Louis — Mechanical Contractor License
St. Louis requires HVAC contractors to hold a city-issued mechanical contractor license and obtain mechanical permits for each project from the St. Louis Building Division.
Missouri State Requirements
1 requirementMissouri Division of Professional Registration — HVAC Contractor License
Missouri does not have a statewide HVAC license requirement, but many cities and counties (including Kansas City and St. Louis) have local licensing requirements. All contractors must comply with EPA Section 608 for refrigerant handling.
Federal Requirements
2 requirementsEPA Section 608 Technician Certification
Federal law requires all HVAC technicians who purchase or handle refrigerants to be certified under EPA Section 608 of the Clean Air Act. Certification is available in Type I (small appliances), Type II (high-pressure), Type III (low-pressure), and Universal categories. Certification is obtained through an EPA-approved testing organization such as ESCO Institute or NATE.
EIN (Employer Identification Number)
Required if you have employees or operate as an LLC or corporation. Free from the IRS.
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