Which South Carolina plumbing license do you need?
Choose the license by project type and total construction cost, not by a journeyman-or-master title. South Carolina separates residential plumbing from commercial contracting.
Residential plumbing work exceeding $500 requires a license. (South Carolina Residential Builders Commission) State law says no entity or individual may offer or perform general or mechanical contracting above $10,000 without a Chapter 11 license. (South Carolina Code § 40-11-30)
That produces two practical routes:
| Work you contract | State path | Main gate |
|---|---|---|
| Residential plumbing over $500 | Residential Plumber license | Commission approval, experience, and examinations |
| Commercial mechanical contracting with total construction cost greater than $10,000 | Mechanical contractor license, Plumbing subclassification | Entity licensure, primary qualifying party, examinations, and financial group |
Do not start with a generic search for a South Carolina master plumber card. Start with the job’s residential or commercial use and total construction cost.
Residential Plumber license
The Residential Builders Commission says applicants must meet its application, experience, and examination requirements. Work experience must be verified and approved before you are made eligible for the exam. (South Carolina Residential Builders Commission)
Use this sequence:
- Submit the application, supporting documents, and fee to the commission.
- Wait for the commission’s eligibility review and experience approval.
- Take the required examinations or document an eligible technical-exam waiver.
- Follow the post-exam licensing instructions sent to approved applicants.
The current page says an online application is not complete until payment is submitted. It also gives a first-time applicant one year after complete submission to provide all required information. (South Carolina Residential Builders Commission) Treat that as an outside deadline, not a reason to let an incomplete file sit.
Commercial plumbing is a mechanical-contractor classification
State law says no entity or individual may offer or perform general or mechanical contracting above $10,000 without a Chapter 11 license. (South Carolina Code § 40-11-30) The same chapter defines mechanical construction to include installing, replacing, or repairing plumbing. (South Carolina Code § 40-11-20)
Commercial licensing attaches to the contracting entity and its people. A primary qualifying party is the principal individual responsible for directing or reviewing work in the license classification or subclassification. (South Carolina Code § 40-11-20) For plumbing, the entity needs the mechanical-contractor Plumbing subclassification and a primary qualifying party tied to it.
The statutory Plumbing scope includes installation, replacement, alteration, and repair of plumbing within property lines, plus listed water-supply, drainage, fixture, appliance, and related work. (South Carolina Code § 40-11-410) Read that scope before assuming a plumbing classification covers utility, right-of-way, fire-sprinkler, or process-piping work.
Exams, experience, and waiver routes
On the residential path, a waiver removes only the technical portion when the applicant meets a listed condition. Work experience requirements and the Business Management and Law portion of the exam are still applicable. (South Carolina Residential Builders Commission)
The residential page currently lists three waiver routes: an eligible South Carolina mechanical-contractor plumbing license, an eligible examined license from Mississippi or North Carolina, or an eligible master-plumber certification. The certification route changed for 2026. The page accepts qualifying MASC certifications issued by examination through December 2025 and qualifying Carolinas AGC certifications issued after January 1, 2026. (South Carolina Residential Builders Commission)
For commercial qualifying-party certification, state law requires at least 70% on the required technical examination and at least 70% on the South Carolina law examination. (South Carolina Code § 40-11-230) A primary qualifying party must also document at least two years of full-time experience within the previous five years in the requested classification or provide other board-approved proof. (South Carolina Code § 40-11-230)
An out-of-state commercial license can support an exam waiver, but it is not an automatic license transfer. The board may grant a waiver where another state’s standards and agreement qualify, and the applicant may still have to pass South Carolina’s business, law, and project-management exam. (South Carolina Code § 40-11-290)
Residential fees and commercial bid limits
The Residential Builders Commission currently lists these Residential Plumber fees. (South Carolina Residential Builders Commission)
| Fee | Amount |
|---|---|
| Application | $135 |
| License | $220 |
| Renewal | $220 |
| Late renewal | $50 |
| Reinstatement | $480 |
Commercial plumbing contractors must also select a financial group. For mechanical contractors, Group One limits bids and jobs to $35,000 per job and requires $7,000 net worth or $3,500 working capital. Group Five allows unlimited bids and jobs and requires $300,000 net worth or $200,000 working capital. (South Carolina Code § 40-11-260) Groups Two through Four fill the space between those endpoints.
The statute allows a surety bond in place of the required financial statement. The bond amount must equal the net-worth requirement for the selected group. (South Carolina Code § 40-11-262) Choose the group from the largest job you intend to bid, not the size of your first job.
State license and the local permit check
Both licensing routes are statewide, while county or municipal officials handle permit issuance where a permit applies. South Carolina law directs a county or municipal building official to refuse a permit for regulated work unless the applicant shows the required license or an exemption. (South Carolina Code § 40-11-350)
That statute establishes the license check at permit issuance; it does not create one statewide local inspection procedure. Ask the authority serving the job address what permits, reviews, and inspections apply there. A local permit does not replace the state Residential Plumber or mechanical-contractor credential.
For the broader construction-license context, read our South Carolina contractor license guide. If your company also self-performs electrical work, South Carolina electrical licensing follows its own residential and commercial split.
South Carolina plumbing license FAQ
Does South Carolina have a statewide plumbing license?
Yes, but it is split. Residential plumbing work over $500 uses the Residential Plumber path. For commercial work, Chapter 11 licensing applies when the total cost of general or mechanical construction is greater than $10,000. (South Carolina Residential Builders Commission; South Carolina Code § 40-11-30)
Does an exam waiver remove every residential exam?
No. The commission says the waiver can remove the technical portion, but work experience and the Business Management and Law exam still apply. (South Carolina Residential Builders Commission)
What experience does a commercial primary qualifying party need?
The statute requires proof of at least two years of full-time experience within the previous five years in the requested classification, or other board-approved proof. (South Carolina Code § 40-11-230)
Can a commercial plumbing contractor bid any job size?
Only with the right financial group. Mechanical Group One stops at $35,000 per job; Group Five is unlimited, and the middle groups have intermediate limits. (South Carolina Code § 40-11-260)