South Carolina HVAC License Application

Commercial and Residential Applications Are Completely Separate

South Carolina doesn't have a single HVAC license application. Which forms you file depends on whether you're pursuing commercial or residential licensing — and the two boards use entirely different systems.

The Contractor's Licensing Board (CLB) handles commercial mechanical licenses through its forms and filing instructions. The Residential Builders Commission (RBC) handles residential HVAC specialty licenses through an online electronic portal. Mixing up the systems is an immediate dead end.

Commercial License Applications (CLB)

Three core documents make up the commercial mechanical contractor application package:

Document 165: General and Mechanical Contractor Application

Doc 165 is the business entity application — it registers your company (LLC, corporation, sole proprietorship, or partnership) with the CLB for a mechanical contractor license. This is where you declare your desired trade subclassifications (Air Conditioning, Heating, Packaged Equipment, Refrigeration) and your target financial group (1 through 5).

The initial filing fee is $350, which is non-refundable regardless of whether your application is approved. Doc 165 requires your business entity's legal name, South Carolina Secretary of State registration number, EIN, physical and mailing addresses, and the name of your designated Primary Qualifying Party.

Document 168: PQP Initial Application

Doc 168 registers your company's Primary Qualifying Party (PQP) — the individual who holds the technical qualifications for the company's trade work. The PQP must have passed the required PSI trade exam and the Business Management and Law exam.

Doc 168 is submitted together with Doc 165. There is no separate filing fee — the PQP application is included in the $350 Doc 165 fee. You'll need to attach your PSI exam pass sheets directly to this form.

Document 167: Work Experience Affidavit

Doc 167 is where the PQP documents their qualifying commercial experience. The CLB requires at least two years of primarily commercial mechanical experience within the past five years. The affidavit must be completed by the supervising licensee who directly oversaw the work.

The description of work is the critical section. The board wants to see the specific physical tasks you personally performed — not project summaries, not company-level achievements. "Installed split-system heat pumps, ran refrigerant lines, performed startups and commissioning for commercial tenant build-outs" works. "Managed HVAC projects" does not.

Tax documentation (W-2s or 1099-MISC forms) must match the employment dates listed on the affidavit. Any mismatch between the dates on your tax records and the experience periods claimed will trigger a board review and potentially a formal denial.

Commercial Filing Order

The sequence matters because the CLB has specific dependencies:

1. Form your business entity with the SC Secretary of State first. You need the registration number for Doc 165.
2. Pass both PSI exams — the trade exam and the Business Management and Law exam. Unlike the RBC, the CLB does not require pre-approval before scheduling exams. You can test first and apply after.
3. Prepare financial documentation — either a financial statement (owner-prepared for Groups 1–2, CPA-prepared for Groups 3–5) or a surety bond matching your target group's net worth requirement.
4. Assemble and submit Doc 165, Doc 168, Doc 167 with tax verification, financial documentation, and PSI pass sheets as a single package.

The CLB reviews the complete package. Submit all required documents together and follow the current CLB filing instructions.

Residential License Application (RBC)

The RBC uses an online electronic portal — there is no paper application. The system gives you exactly 30 days from when you start the application to complete and submit it. Once you pay the application fee, you have a maximum of one year to submit all supporting documents (exam pass scores, credit report, any required SLED background check). If you miss that one-year window, the application expires, fees are forfeited, and you start over.

The residential application requires:

• Application fee: $135
• Personal credit report: Must be dated within 30 days of submission (TransUnion, Experian, or Equifax)
• PSI exam pass sheets: Both the residential HVAC trade exam and the residential Business and Law exam
• Experience verification: One year of residential HVAC experience in the past five years under a licensed builder or HVAC contractor
• Surety bond: $10,000 flat bond if you'll perform work exceeding $5,000 per project (issued in your individual legal name)

A critical difference from the commercial track: the RBC must approve your experience before you can register for the PSI exams. You submit the application with your experience documentation first, wait for board approval, then schedule your exams. Trying to test before RBC approval will leave you without an eligibility letter, and PSI won't let you register.

Common Filing Mistakes

Submitting to the wrong board. If your work is residential-only (structures three stories or fewer, 16 units or fewer), you go through the RBC. If any of your work is commercial, industrial, or institutional, you need the CLB. Filing with the wrong board wastes your non-refundable fees.

Paying by cash at the RBC. The Residential Builders Commission operates a strict "No Cash" policy. They accept checks and money orders only.

Letting the credit report expire. The 30-day window on the credit report is rigid. Order it last, submit immediately.

Vague experience descriptions. Both boards expect specific descriptions. Document specific tasks, equipment types, and your personal role on each project.

The South Carolina HVAC License Guide walks through the exact filing sequence for both tracks, including document preparation checklists and the specific formatting the boards expect — so your application package moves through review without delays.

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