Who licenses HVAC work in South Carolina
South Carolina splits HVAC licensing between two boards inside the Department of Labor, Licensing and Regulation. The Residential Builders Commission issues the Residential HVAC Installer and Repairer license, the credential most service and change-out companies hold. LLR states plainly that residential HVAC work exceeding $500 requires that license. The Contractor's Licensing Board handles the commercial side. Section 40-11-30 of the state code says no entity may perform contracting work for which the total cost of construction is greater than $10,000 for mechanical contracting without a license issued by that board. Act 69 of 2023 raised that figure from $5,000, so older guidance you find online is wrong. A company replacing a split system in a house answers to the Residential Builders Commission. A company bidding a rooftop unit on a retail building above $10,000 needs a mechanical contractor license. Many South Carolina firms carry both credentials because they sell both kinds of work. The two boards share an address in Columbia and nothing else. They run separate applications, separate exams, separate fee schedules, separate bonding rules and separate renewal calendars. The Residential Builders Commission licenses the individual and not the company. The Contractor's Licensing Board licenses the business entity and requires that entity to name a primary qualifying party for every classification it wants. Picking the wrong track wastes months, because a building official is required by Section 40-11-350 to refuse a permit to an applicant who cannot show the right license. Decide which board covers the work you actually sell before you pay an application fee.
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What the residential HVAC license actually lets you install
Regulation 106-1(c) draws a hard equipment line around the residential license, and it is the detail most contractors miss. The heating and air conditioning installers and repairers classification covers air conditioning equipment and systems limited to five tons cooling and 175,000 BTU per hour heating per unit. Inside that ceiling the classification is broad. It covers installation, replacement, alteration and repair of package equipment, heating and cooling systems, ventilation systems including duct work, air filtering devices, water treatment devices, pneumatic or electrical controls, control piping, thermal and acoustical insulation, vibration isolation materials, liquid fuel piping and tanks other than liquid propane gas, water and gas piping from service, heating circuits, air handling systems, gas fired furnaces, space heaters, factory assembled single package units, and split type direct expansion equipment including heat pumps. Step above five tons or above 175,000 BTU per hour on a single unit and the residential license no longer carries the job. A residential specialty contractor registration is capped at three trade classifications, and anyone who needs more than three must license as a residential builder instead. The scope limit has teeth on the sales side too. LLR states that a residential specialty contractor is prohibited from undertaking work outside the scope of the registration, including employing, hiring, contracting or subcontracting with others to perform that work on his or her behalf. You cannot sell a job you are not licensed for and then hand it to a sub.
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Mechanical contractor classifications that cover HVAC
On the commercial side the Contractor's Licensing Board does not issue one HVAC license. It issues a mechanical contractor license carrying named classifications, and each classification has its own technical exam. The mechanical classifications that require a technical exam are Air Conditioning, Heating, Packaged Equipment, Refrigeration, Process Piping, Plumbing, Electrical and Lightning Protection. An HVAC firm typically pursues Air Conditioning and Heating, adds Packaged Equipment for rooftop work, and adds Refrigeration if it services cases, walk-ins or process cooling. An entity may apply for and be licensed in more than one classification as long as it meets the qualifications for each. Each classification or subclassification needs a designated primary qualifying party, described by the board as the principal individual responsible for directing or reviewing work performed in that classification. Additional qualifying parties can pass the same exams without holding the primary designation, which matters when your one certified person leaves. Three of these subclassifications carry a special advertising duty under Section 40-11-270, namely air conditioning, heating and packaged equipment, so pay attention to which ones you hold. The board also runs a boiler safety program, and Boiler Installation sits on the general contractor side rather than the mechanical side. Read the classification definitions before you choose, because the license confines you to the limitations of your license group and your classifications, and bidding outside them is a disciplinary matter rather than a paperwork problem.
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Experience and background you must document for the residential license
The Residential Builders Commission wants one year of hands-on residential HVAC work experience, and that year must have been gained within the five years preceding your application. You name your supervisors on the application and the Commission mails an experience affidavit directly to them. Whoever you name has to be a licensed residential HVAC contractor or another appropriately licensed professional engaged in residential HVAC work. Back the claim with W-2s, 1099s, transcripts, certifications and photos. The year does not have to be South Carolina work. It can come from any state or country. A college degree does not substitute for it. If you apprenticed unpaid and have no W-2s or 1099s, the Commission requires you to appear in person for an experience review. Section 40-59-250 adds a credit check to the file. Applicants must submit a full credit report, and the Commission accepts TransUnion, Experian or Equifax. Staff are not scoring your credit. They are looking for outstanding liens and judgments, and the statute also requires you to list any judgments against you or entities you were associated with over the past five years. Staff also check the South Carolina Public Index and the national and state sex offender registries. Commission staff review applications for accuracy and completeness within fifteen business days, and an application stays valid for one year from receipt. Miss that window and you reapply and pay again.
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The residential exams and how many attempts you get
Once the Commission approves your application it emails or mails an examination eligibility letter. You then schedule with PSI directly and pay PSI, not LLR. There are two parts and you must pass both: the Residential HVAC technical portion and the South Carolina Business Management and Law exam. The business portion is not optional for anyone, including applicants coming in on a technical exam waiver. Your examination eligibility is valid for one year. Inside that twelve month window you get three attempts. Fail three times and you must wait twelve months from the date of the third failure before testing again. Fail to pass within the twelve month eligibility period and you start over with a new application and new fees. The Commission does not endorse any exam prep provider. It states outright that it is not affiliated with and does not sponsor, approve or recommend any school, prep course or seminar for the Residential HVAC exam, so treat every prep company claiming an LLR connection as marketing. Plan the sequence realistically. Application review takes fifteen business days before eligibility is issued, and any request for more information restarts a fifteen business day clock. A contractor who wants to be selling licensed residential work by spring should have the application in well before winter, because nothing about this process moves faster if you push it.
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Qualifying party certification for the commercial license
The commercial track certifies people first and licenses the company second. Before an entity can apply, its primary qualifying party has to be certified. Certification requires at least two years of work experience performed within the past five years for the requested classification or subclassification, and unless a classification says otherwise that experience should be primarily commercial. The applicant passes the appropriate PSI technical exam for the classification plus the South Carolina Business Management and Law for Commercial Contractors exam. Section 40-11-230 sets the bar at a grade of seventy percent or better on both the technical exam and the exam on South Carolina law regulating general and mechanical contracting. The same section limits testing to two attempts in any classification within a twelve month period, and after that once every six months. There are no pre-approvals needed to schedule with PSI, so a qualifying party can test before the company files anything. An individual can be certified in a classification regardless of current employer, which makes the certificate portable. Watch the expiry trap: an applicant who has not been certified as a qualifying party for four or more consecutive years must retake the technical exam, the Code of Laws exam, or both, as the board requires. Transferring a certification that has been inactive under four years to a new license is a form filing. Letting it sit past four years means testing again.
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License group limits, financial statements and bonds for mechanical contractors
The Contractor's Licensing Board caps what a mechanical contractor may bid and build using a group system tied to money you can prove. Group 1 allows a bid and job limit of $35,000 and asks for $3,500 working capital, $7,000 net worth, or a $7,000 surety bond. Group 2 allows $100,000 against $10,000 working capital, $15,000 net worth, or a $15,000 bond. Group 3 allows $200,000 against $20,000, $30,000 or a $30,000 bond. Group 4 allows $400,000 against $40,000, $60,000 or a $60,000 bond. Group 5 is unlimited and requires $200,000 working capital, $300,000 net worth, or a $300,000 bond. You meet either the working capital test or the net worth test, not both, or you post the bond instead. The proof required scales with the group. Groups 1 and 2 may submit an owner prepared financial statement with an affidavit of accuracy. Groups 3 and 4 need a financial statement compiled by a licensed CPA under GAAP. Group 5 needs an audited balance sheet prepared by a licensed CPA under GAAP. Every balance sheet must be dated no more than twelve months before the application and must arrive with a signed CPA cover letter. Personal financial statements of the principals are accepted only on an initial application for an entity with less than two years of operating history. Your group limit is a sales ceiling, so set it where your pipeline actually is.
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The residential bond, workers compensation and what the state does not require
Residential bonding is triggered by job size, not by license type. Regulation 106-2 states that when the cost of an undertaking to be performed by a licensed residential specialty contractor exceeds $5,000, the licensee must obtain an executed surety bond in an amount approved by the Commission of not less than $10,000. Section 40-59-240(D) says the same thing from the statute side, counting the total cost of materials and labor for an undertaking performed for an individual property owner. The Commission requires the bond be issued in the licensee's own name as principal, not in a company or business name, unless it is a certificate of authorization bond. Once an original bond on the current form is on file, a bond continuation certificate is accepted afterward. Workers compensation is a separate agency and a separate test. The South Carolina Workers Compensation Commission states that as a general rule businesses regularly employing four or more employees in South Carolina must carry coverage, and it counts part-time workers and family members as employees. Businesses with fewer than four employees or an annual payroll under $3,000 are listed as exempt. Note what is absent. Chapter 40-11 of the state code sets no continuing education requirement and no general liability insurance minimum for mechanical contractors. Financial responsibility there is proved by a financial statement or a surety bond. Carrying general liability is a commercial decision and a customer expectation in South Carolina, not a licensing condition.
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What each South Carolina HVAC license costs
The Residential Builders Commission posts a short fee table for the Residential HVAC Installer and Repairer license, coded RBH. The application fee is $135. The license fee is $220. The renewal fee is $220. A late renewal adds a $50 late fee. Reinstatement costs $480. If you operate through a firm you may also need a certificate of authorization, which carries a $100 application fee and a $100 renewal fee. The Contractor's Licensing Board charges a flat $350 initial license fee for both general and mechanical contractor licenses. Biennial renewal is $135 when renewed or postmarked on or before October 31. After that the board stacks late fees by month: a $100 late fee in November brings the total to $235, a $150 late fee in December brings it to $285, and a $200 late fee in January brings it to $335. Reinstatement is $350. A replacement certificate costs $10 and a replacement license costs $5. None of these figures include PSI examination fees, which PSI sets and collects directly, or the cost of a CPA prepared financial statement or a surety bond premium. Budget for the whole stack rather than the headline application fee. A contractor going commercial for the first time is typically paying a qualifying party exam sequence, the $350 license fee and either CPA work or bond premium in the same quarter.
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Renewal calendars, lapse and reinstatement
The two boards run on different clocks and neither is forgiving. The Residential HVAC license renews every two years, before June 30 of each odd-numbered year. The Commission mails a courtesy renewal notice in mid to late April and sends a reminder eblast during renewal season, but the responsibility is yours. Miss June 30 and the license lapses that day. A lapsed residential license may stay inactive for up to three years before you are required to reapply and retest under Section 40-59-230(A). Mechanical contractor licenses expire October 31 of every odd-numbered year, while general contractor licenses expire October 31 of every even-numbered year, so a firm holding both renews in alternating years. Mechanical renewal is not just a fee. The board requires a current financial statement or surety bond supporting your requested group limitation at renewal as well as at first application. Let the financial documentation go stale and your group can drop, which quietly shrinks the size of job you are allowed to bid. Continuing education is not a statutory condition on the commercial side. Chapter 40-11 contains no continuing education requirement. On the residential side Section 40-59-230(B) gives the Commission authority to require continuing education by regulation as a condition of renewal, so check the current regulation before you assume you owe zero hours.
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Reciprocity, exam waivers and storm emergency licenses
South Carolina will waive the technical portion of the residential HVAC exam in three situations, and never the business portion. First, if you hold a current license in an eligible state that was obtained by examination and has been held for one year or longer. LLR lists the eligible states for the Residential HVAC Installer and Repairer as Alabama, Mississippi and North Carolina. Grandfathered licensees do not qualify, and a verification of licensure must come to the Commission directly from the issuing state. Second, if you are a currently licensed South Carolina Mechanical Contractor with the Air Conditioning or Packaged Equipment classification, held in good standing and active for a year or longer and obtained by examination. Commission staff verify that internally. Third, if you hold a HARV, or Master Mechanical, certification issued by examination between September 7, 2013 and December 2025 by the Municipal Association of South Carolina, or issued after January 1, 2026 by Carolinas AGC, which took over the South Carolina mechanical trades certification program. On the commercial side that same HARV certification maps to the Air Conditioning and Heating classifications, and the board publishes a technical exam waiver agreement list for out-of-state licensees. After a governor declared emergency, Regulation 106-5 lets LLR issue emergency licenses to out-of-state specialty contractors with a $5,000 bond, a $100 fee and a recent criminal background report, capped at $35,000 valuation per project for one named event.
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Advertising, license display and using a company name
South Carolina writes display rules directly at HVAC contractors, which most states do not. Section 40-11-270(B) requires each person holding a license in the mechanical contractor subclassification of air conditioning, heating or packaged equipment to display the mechanical contractor license in a conspicuous manner at the principal place of business. Subsection (C) goes further. All commercial vehicles used by mechanical contractors licensed in those subclassifications exclusively in the daily operation of their business must have the mechanical contractor license number prominently displayed on them, and each invoice and proposal form must also contain the license number. That means your wrap, your estimate template and your invoice template are all compliance documents. Section 40-11-170 makes false, misleading or deceptive advertising whereby a member of the public may be misled and injured a ground for discipline, alongside contracting or bidding while a license is suspended. The residential side has a naming rule instead. The Residential Builders Commission licenses the individual, not the company, and will only attach a company name to your license if you own at least fifty-one percent of that company. You submit a certificate of existence or authority and articles from the Secretary of State to prove it. Advertise a trade name that is not affiliated with your license record and you are advertising a license you do not hold under that name.
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What unlicensed HVAC work costs in South Carolina
The penalties run on two tracks because the licensing does. Under Section 40-11-200(A), a person who practices or offers to practice in violation of the contractor chapter, or who knowingly submits false information to obtain a license, is guilty of a misdemeanor and on conviction must be imprisoned not more than one year or fined not more than $5,000. Section 40-11-100 lets LLR skip the board and issue administrative citations and cease and desist orders directly, assessing penalties against any entity or individual including unlicensed contractors. Separate citations may issue for each violation, capped at $2,500 in administrative penalties per entity or individual per day, and those penalties are separate from and in addition to civil or criminal remedies. On the residential side, Section 40-59-30(A) makes engaging or offering to engage in residential specialty contracting without a license a misdemeanor punishable by a fine of not less than $500 and not more than $10,000, imprisonment of not less than thirty days, or both. The commercial consequence is worse than the fine. Section 40-59-30(B) bars an unlicensed person or firm from filing a mechanics lien or bringing any action at law or in equity to enforce the contract. You do the work and you cannot sue to get paid. Section 40-11-200(B) also makes it a violation for an owner or awarding authority to consider your bid at all.
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The city and county layer on top of your state license
A state license does not exempt you from local registration. Section 40-59-240(C) states that residential specialty contractors are not exempt from complying with county and municipal business license ordinances or other regulatory ordinances, and that a county or municipality may require a residential specialty contractor to be examined and licensed under its own standards. There is one protection worth knowing: if you have passed an examination in your area of contracting approved by the Commission, no additional examination may be required by a county or municipality. They can charge you. They cannot retest you. The business license side is standardized statewide by Section 6-1-400. Every business license runs a twelve month period beginning May 1 and ending April 30, or for a construction contract until the project is complete, and must be renewed before May 1 or penalties apply. The tax is computed on gross income for the preceding calendar or fiscal year, or on projected income for a business under a year old. Every taxing jurisdiction must accept the standard business license application issued by the Revenue and Fiscal Affairs Office, must adopt the standardized class schedule by ordinance by December 31 of every odd year, and must provide access through the state business license tax portal as well as in person, by phone and by mail. If you run calls across Charleston, Columbia, Greenville and the surrounding counties, you file in each jurisdiction that levies the tax, on one shared calendar.
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How a South Carolina customer checks you out
LLR runs a public licensee lookup covering every board it administers. From the main menu a homeowner picks Residential Builders to check a Residential HVAC Installer and Repairer, or Contractors to check a mechanical contractor license. The Contractor's Licensing Board also links a contractor specific lookup and publishes board orders, so disciplinary history is public alongside license status. Both boards publish complaint filing pages, and the Office of Investigations and Enforcement takes referrals. Assume every commercial general contractor and a growing share of homeowners run the lookup before signing. Two practical consequences follow. First, the name on your license record has to match the name you advertise and the name on your proposal, or the search returns nothing and you look unlicensed. Residential licensees should confirm the company name is affiliated with the license in the LLR database rather than assuming it carries over. Second, publishing your license number is free credibility that South Carolina already requires of licensed air conditioning, heating and packaged equipment mechanical contractors on invoices, proposals and commercial vehicles under Section 40-11-270. Put the same number in the footer of your website, on your estimate template and in your Google Business Profile description. A verifiable number shortens the gap between a customer finding you and a customer calling you.
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EPA Section 608 sits on top of the state license
Neither South Carolina board certifies refrigerant handling, and the state license does not substitute for the federal one. EPA regulations at 40 CFR Part 82, Subpart F, issued under Section 608 of the Clean Air Act, require that technicians who maintain, service, repair or dispose of equipment that could release ozone depleting refrigerants into the atmosphere must be certified. The test structure is set by EPA: a Core section plus Type I for small appliances, Type II for high pressure equipment, and Type III for low pressure equipment. Certification is delivered through EPA approved certifying organizations, and EPA states that it does not issue certification cards itself, so a lost card is replaced through the organization that tested you, not through EPA and not through LLR. Section 608 certification is per technician. Your company holding a South Carolina Residential HVAC Installer and Repairer license or a mechanical contractor license with the Air Conditioning classification does nothing for the helper who breaks into a sealed system. Build the check into hiring rather than discovering it during an inspection. The two credentials also answer different questions for a customer. The LLR license proves you may legally contract for the work in South Carolina. The Section 608 card proves the person at the condenser may legally open it. Name both when you sell.
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