Looking for a "Missouri HVAC license"? Here's the straight answer: there isn't a statewide one. Missouri does not issue a state HVAC or mechanical contractor license — licensing is handled city by city — and one federal certification applies everywhere. This guide covers what's actually required at the local and federal level.
Missouri Has No Statewide HVAC License
HVAC and mechanical contracting in Missouri is licensed at the local (municipal or county) level, not by the state. Requirements, fees, exams, and insurance are set by each jurisdiction, so what you need depends on where you work.
Federal EPA Section 608 Certification (Required Everywhere)
While Missouri has no statewide license, the EPA Section 608 Technician Certification is mandatory nationwide for anyone who maintains, services, repairs, or disposes of equipment that could release covered refrigerants.
- Tests must be administered by an EPA-approved certifying organization, and the certification does not expire.
- Types: Type I (small appliances), Type II (high-pressure), Type III (low-pressure), Universal (all three).
It is a federal requirement, separate from — and not a substitute for — any local contractor license.
How Local HVAC Licensing Works in Missouri
Because licensing is local, your requirements depend on the jurisdiction. The reliable approach is to contact the building or licensing department where you'll work and ask for their current contractor checklist before you bid or begin a job.
For example, the City of St. Louis issues mechanical permits to licensed mechanical contractors certified by its Building Division. Permits are required for work such as boilers, furnaces, exhaust fans and hoods, and ventilation systems, and the city charges a $25 application fee per mechanical permit. Other Missouri cities and counties run their own contractor licensing or registration programs.
Requirements vary by jurisdiction, so confirm the specifics — experience, any local exam, insurance, and fees — with the local building or licensing authority where you work.
Reciprocity
Because Missouri issues no statewide HVAC license, there is no statewide license to transfer to or from another state, and no statewide reciprocity. You must meet the local requirements of each Missouri jurisdiction where you work.
Verifying an HVAC License in Missouri
To verify a contractor's local license or registration, contact the building or licensing department of the specific city or county. To verify federal certification, ask the technician to present their EPA Section 608 certification card.