HVAC Contractor Permit Requirements in Charleston, SC

1. EPA 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.

   Official government source

   $20–$60 (exam fee)·1–2 weeks (exam scheduling)

   $20–$60 (exam fee)

   1–2 weeks (exam scheduling)

2. EIN (Employer Identification Number)

   Required if you have employees or operate as an LLC or corporation. Free from the IRS.

   Official government source

   Free·Immediate (online application)

   Free

   Immediate (online application)

1. SC Contractor's Licensing Board — Mechanical Contractor License

   South Carolina requires HVAC contractors to hold a Mechanical Contractor license from the SC Contractor's Licensing Board (LLR). A qualifying party must pass the trade examination administered by the Board's testing vendor, and the business must meet the Board's financial statement and insurance requirements — confirm current amounts with LLR rather than assuming a figure.

   Official government source

   $350 initial license fee (General and Mechanical Contractors); $135 biennial renewal, plus a separate vendor examination fee (SC CLB fee schedule)·Not published by the Board. Mechanical Contractor licenses expire October 31 of each odd-numbered year (General Contractor licenses, October 31 of each even-numbered year).

   $350 initial license fee (General and Mechanical Contractors); $135 biennial renewal, plus a separate vendor examination fee (SC CLB fee schedule)

   Not published by the Board. Mechanical Contractor licenses expire October 31 of each odd-numbered year (General Contractor licenses, October 31 of each even-numbered year).

1. City of Charleston Business License + Mechanical Permit

   HVAC contractors working in Charleston need a City of Charleston Business License from the Revenue Collections Division and a mechanical/trade permit for each installation, pulled through the city's Permit Center (Building Inspections Division). A state SC LLR Mechanical Contractor license is required separately for work over the state threshold.

   Official government source

   Business license: based on gross income and NAICS rate class (SC Code 6-1-400 et seq.). Mechanical permit: per the city's Building and Trade Permit Fee Schedule, driven by project valuation — no flat amounts.·Business licenses expire April 30 annually; some trade permits may be approved same-day if the submittal is complete. The city publishes no general turnaround.

   Business license: based on gross income and NAICS rate class (SC Code 6-1-400 et seq.). Mechanical permit: per the city's Building and Trade Permit Fee Schedule, driven by project valuation — no flat amounts.

   Business licenses expire April 30 annually; some trade permits may be approved same-day if the submittal is complete. The city publishes no general turnaround.

Official Sources

• Charleston Building Inspection
• South Carolina Contractor's Licensing Board

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