Illinois has no statewide HVAC license — requirements are set entirely by local jurisdictions. Chicago has the most structured local licensing system; contractors must verify requirements for every municipality where they work.
Varies by municipality — Chicago requires 4 years documented experience for the Mechanic license
Varies by municipality
Varies by municipality
N/A at state level
Reciprocity agreements can change. Always verify current status directly with No state issuing body. Chicago Department of Buildings is the most significant local authority. before relying on reciprocity for licensure.
Illinois is one of the largest "local-only" states. Chicago has a well-developed local licensing system. HVAC contractors working in multiple Illinois jurisdictions may need separate local licenses for each.
EPA 608 Certification — Required in All 50 States
Regardless of Illinois's state licensing rules, any technician who purchases, handles, or works with regulated refrigerants must hold EPA Section 608 certification. This is a federal requirement under the Clean Air Act that no state law can waive. EPA 608 Universal (covering Type I, II, and III) is the most versatile credential for most HVAC roles.
Browse EPA 608 Universal jobs in IllinoisThe following exam information applies to a specific locality in Illinois. Licensing requirements vary by city and municipality — check with your local building or licensing department for the rules that apply where you intend to work.
Chicago's Department of Buildings administers the HVAC Mechanic exam for the City of Chicago HVAC Mechanic License, which requires 4 years of documented field experience. The exam tests knowledge of the Chicago Building Code's mechanical provisions, refrigeration systems, and electrical safeties. Candidates working outside Chicago should contact their specific municipality's building department for local exam requirements.
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Last verified: 2026 · Always confirm current requirements with your state licensing board before starting work or submitting an application.
No state issuing body. Chicago Department of Buildings is the most significant local authority.
Visit official board website