1.1 Licensing Framework, Classifications & Scope

How South Carolina Tests General Contractors

Commercial general contractors in South Carolina are licensed by the South Carolina Contractor's Licensing Board (CLB), part of the Department of Labor, Licensing and Regulation (LLR). The governing statute is S.C. Code Title 40, Chapter 11, with the Board's rules in S.C. Code of Regulations Chapter 29. PSI Services administers every examination. The license is issued to a business entity, and the entity qualifies through an individual qualifying party who has passed the required exams.

A qualifying party normally passes two exams:

1. The South Carolina Business Management and Law for Commercial Contractors exam. The statute calls it an examination of South Carolina law regulating general and mechanical contracting (§ 40-11-230(A)(3)). LLR also refers to it as the SC Business Law and Project Management for Commercial Contractors exam.
2. A technical exam for each license classification, where one is required.

Key logistics from the Candidate Information Bulletin:

• All commercial contractor exams are open book. You may bring the listed references. They can be highlighted, underlined, and indexed with permanent tabs, but they cannot contain handwritten notes or loose papers. The Business and Law exam's reference is the NASCLA Contractors Guide to Business, Law and Project Management – South Carolina Commercial Contractors, 9th edition.
• Up to ten unscored pretest questions may appear, and the time you spend on them counts against the exam clock.
• A technical exam in a classification may be taken twice in a 12-month period and then once every six months (§ 40-11-230). PSI's bulletin notes that the Business and Law exam may be taken on an unlimited basis over a 12-month period.
• You must pass the exams before applying for the license. The commercial application then documents at least 2 years of experience within the last 5 years in the classification on an experience affidavit. The initial license fee listed by LLR is $350.
• Section 40-11-230(B) ties the building exam to the license group. A primary qualifying party for a Group 1, 2, or 3 general contractor may pass either the limited building exam or the unlimited general contractor exam. Buildings built under a limited-exam qualifier are restricted to three stories. A qualifier for Group 4 or 5 must pass the unlimited exam, which is the NASCLA National Commercial Building Contractor exam at PSI.

This guide covers the Business and Law outline and the Limited Building outline. The NASCLA exam is a separate national exam with its own outline.

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The Licensing Threshold and the "Total Cost of Construction"

Under S.C. Code § 40-11-30, no entity or individual may practice as a contractor by performing or offering to perform work where the total cost of construction is greater than $10,000. The same threshold applies to general and mechanical contracting. Act No. 69 of 2023 raised both from $5,000, so older study materials that quote $5,000 for mechanical work are outdated.

The statute defines "total cost of construction" broadly (§ 40-11-20(26)). It is the actual cost incurred by the owner, all contractors, subcontractors, and others for labor, material, equipment, profit, and incidental expenses for the entire project. Design fees are excluded unless they are part of the construction contract.

Anti-splitting rule (§ 40-11-300(A)): An owner, construction manager, prime contractor, or anyone else with contracting authority may not divide work into portions to avoid licensing, classification, or license-group requirements. The total cost of construction determines the license group for the project. An unlicensed entity found working on a project must immediately withdraw and may not stay on as a subcontractor (§ 40-11-300(B)).

Building officials also enforce licensing. A permit authority must refuse a permit unless the applicant shows it is licensed or exempt, and it must report suspected violators to LLR (§ 40-11-350). The sole prime contractor pulls the permit in the exact name on its license (§ 40-11-420).

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Contractor's Licensing Board vs. Residential Builders Commission

South Carolina has two LLR licensing bodies for construction:

The General Contractors–Building classification in § 40-11-410(1) expressly includes "commercial, industrial, institutional, modular, and all other types of building construction, including residential structures." PSI's bulletin makes the same point. A CLB license allows commercial as well as residential construction, while an entity that works only in residential construction is licensed by the Residential Builders Commission. The reverse does not hold. A residential builder license does not authorize commercial work over $10,000.

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License Classifications and Subclassifications (§ 40-11-410)

Several rules attached to the Building classification are tested often:

• Ancillary work. A Building licensee may do concrete, concrete or asphalt paving, glass and glazing, grading, public electrical utility, and highway incidental work that is directly associated with its building. That work must be done by the licensee itself and may not exceed 20% of the total cost of construction. Otherwise a properly licensed contractor must do it.
• Work that must go to a licensed sub. Mechanical work, swimming pools, bridges, boring and tunneling, water and sewer lines and plants, pipe lines, railroad lines, and marine work need the right license or a licensed contractor.
• Classifications with no technical exam. Boring and Tunneling, Highway Incidental, Masonry, Miscellaneous Metals, and Railroad Lines need only the Business and Law exam plus documented experience.
• Sole prime contractor. A licensee in the Building, Highway, or Public Utility classifications may act as sole prime if 40% or more of the work falls within its classifications. Specialty and mechanical licensees need 51% or more (§ 40-11-340).
• Unlicensed subcontractors may be used within the licensee's group and classification only if the licensee supervises them. The licensee is fully responsible for their violations (§ 40-11-270(E)).

Selected exemptions under § 40-11-360 include the following:

• fire sprinkler and alarm contractors licensed under other chapters
• work on federal enclaves
• SCDOT-prequalified highway work
• owners improving residential property for their own occupancy
• farm or storage buildings under 5,000 sq ft
• public owners doing work within Group 3 general or Group 4 mechanical limits
• billboard work

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Practical Exam Scenarios

Scenario 1 — Mixed-use building. Palmetto Construction LLC holds a Group 5 General Contractors–Building license. It signs a $4,500,000 contract for a four-story building with ground-floor retail and 30 apartments above. The Building classification covers this structure. Palmetto must still use licensed mechanical contractors for the electrical, plumbing, and HVAC scopes unless it holds those mechanical classifications itself.

Scenario 2 — Custom home. The same developer asks Palmetto to build a $1,200,000 single-family home. A CLB Building license covers residential structures, and § 40-59-270 exempts Chapter 11 licensees from the residential licensing chapter. Palmetto may build the house within its license group limit.

Scenario 3 — The threshold. An owner hires an unlicensed electrician for a $7,500 lighting retrofit. The total cost does not exceed $10,000, so § 40-11-30 does not require a CLB license, although local licensing and permit rules still apply. If the owner splits a $24,000 retrofit into three $8,000 contracts, § 40-11-300(A) makes the split unlawful. That job requires a licensed mechanical contractor in the Electrical subclassification.