How Do You Get an HVAC License in South Carolina?

Our research found no state HVAC license issued to individual technicians in South Carolina; the state licenses the business instead.

The Residential Builders Commission requires a license for residential HVAC work exceeding $500, and the Contractor's Licensing Board requires its mechanical contractor license for mechanical contracting when the total cost of construction is greater than $10,000 — a threshold raised from $5,000 by 2023 Act No. 69, effective May 19, 2023.

Local jurisdictions may examine and license residential specialty contractors, but they may not require another exam from a contractor who passed a Commission-approved exam in that trade.

The federal layer applies everywhere: anyone who could violate the integrity of a refrigerant circuit while maintaining, servicing, repairing or disposing of appliances containing CFC/HCFC or non-exempt substitute refrigerants (such as HFCs) must pass an exam from an EPA-approved technician certification program.

Our research found no technician, journeyman or master HVAC license in South Carolina: the state licenses the business instead.

The residential rung is the RBC's Residential HVAC Installer and Repairer license, a residential specialty contractor license, and a licensed residential specialty contractor may hold no more than three classifications.

The commercial rung is the CLB's mechanical contractor license with the subclassifications Air Conditioning (AC, which includes Packaged Equipment and Refrigeration), Heating (HT, hot water and steam systems including boilers and related gas lines) and Packaged Equipment (PK, up to 25 tons cooling and 500,000 BTU/hr heating per unit).

Each licensee is placed in a group that caps how large each job can be, from $35,000 in Group 1 to unlimited in Group 5, backed by a net-worth or working-capital statement or a surety bond of equal size.

Mechanical contractors in the AC, heating or packaged-equipment subclassifications must display the license at their principal place of business and show the license number on commercial vehicles, invoices and proposals.

Work experience must be verified and approved before you are made eligible for the exam, and our research did not confirm the required number of hours for the residential HVAC license, so ask the Residential Builders Commission.

The residential license costs $220 to obtain and $220 to renew, with a $50 late fee and a $480 reinstatement fee; a license lapsed more than three years requires re-examination as a new applicant.

A residential specialty contractor doing jobs over $5,000 for an individual property owner must also file a surety bond in an amount approved by the Commission.

On the commercial side, the CLB requires a certified Primary Qualifying Party for the classification — someone with at least two years of full-time experience in it within the past five years — and a $350 initial fee.

PSI administers the CLB's exams: the technical exam for your classification where one is required, and the PSI S.C. Business Management and Law for Commercial Contractors exam, passed at 70%.

For the residential HVAC license, the RBC requires a Commission-approved exam once your verified work experience is approved, and it waives the technical exam for SC mechanical contractors holding the AC or PK subclassification for 1+ year by exam, licensees from Alabama, Mississippi or North Carolina held 1+ year by exam, and holders of a current MASC or Carolinas AGC HARV certificate — the business and law exam still applies.

Our research does not describe the content outline of either exam, so ask for the candidate information when the board approves your application.

Under the statute the Residential Builders Commission administers, residential licenses renew annually — a cycle our research could not confirm on the RBC's renewal page, so confirm it with the RBC before you rely on it.

The renewal fee is $220, with a $50 late fee and a $480 reinstatement fee, and a license lapsed more than three years requires re-examination as a new applicant.

CLB mechanical contractor licenses expire October 31 of odd-numbered years and renew biennially for $135, with late fees of $100 to $200 extra.

Our research did not establish a continuing-education requirement for either board's licenses, so confirm CE with LLR before you renew.

Through exam waivers rather than blanket reciprocity.

For the residential HVAC license, the RBC waives its exam for licensees from Alabama, Mississippi or North Carolina held 1+ year by exam, and for current MASC or Carolinas AGC HARV certificate holders; the business and law exam still applies.

At the CLB, the board may waive the technical exam for an applicant licensed in a state with an exam-waiver agreement, and Ohio lists South Carolina among its HVAC reciprocity states, with the business-and-law exam required.

Confirm the current agreement list with LLR before you rely on an out-of-state license.

SC LLR runs an online license verification at verify.llronline.com, though our research confirmed that address from LLR's site navigation rather than the lookup page itself, so follow the lookup link from LLR's site.

The licenses the boards issue go to the business, so this is where you confirm a contractor or a prospective employer that claims licensed status.

Search it before you hire, and before you accept a job with a company that says it is licensed.

They can.

South Carolina local jurisdictions may examine and license residential specialty contractors, but a county or municipality may not require an additional exam from a contractor who has passed a Commission-approved exam in that trade.

Local trade certifications add a second layer: the HARV (Master Mechanical) certification was issued by the Municipal Association of South Carolina through December 2025 and by Carolinas AGC from January 1, 2026, and the RBC accepts it for its exam waiver.

Our research did not verify which cities or counties require these certifications, so check with the building or licensing department where the work is done.