Requirements, license levels, and the issuing authority — sourced from South Carolina's official board.
Two separate boards under LLR depending on residential vs. commercial scope. EPA 608 required for refrigerants.
| Requirements | Residential: 1 year of documented supervised experience plus PSI exams (trade + business management & law). Commercial: about 2 years of supervisory experience in the mechanical field within the prior 5 years plus PSI trade and business/law exams. Licensing thresholds: >$200 residential, >$5,000 commercial. |
| Reciprocity | Exam exemption for applicants currently licensed as SC Commercial Mechanical Contractors (HVAC) in good standing, applicants licensed in AL, NC, or MS through that state's exam, or holders of a Masters License from the Municipal Association of S.C. |
| Renewal | Residential HVAC licenses renew June 30 of every odd year (2025, 2027, ...). Commercial mechanical contractor licenses renew every 2 years (odd years). |
| Notes | Two separate boards under LLR depending on residential vs. commercial scope. EPA 608 required for refrigerants. |
Sources: llr.sc.gov. Always confirm current requirements with the issuing authority.
New licenses, ladder upgrades, classification changes and lapses, by market and credential tier. Read the quarterly free, or license the underlying data.