HVAC Contractor License in Louisiana: Requirements, Qualifier, Bond and Exams

Yes — at the business level, and the requirement is statewide.

Louisiana requires a state contractor license from the Louisiana State Licensing Board for Contractors (LSLBC) for electrical, mechanical or plumbing projects exceeding $10,000 including labor and materials, and HVAC work is regulated through the board's Mechanical classification.

There is no statewide license for individual HVAC technicians: the state licenses the company, not the tech.

Two provisions make the state license portable across Louisiana — statewide-licensed mechanical, plumbing and electrical contractors are exempt from local examination requirements and may work in any local jurisdiction after paying local fees, and the law bars cities and parishes from requiring their own exams or certification of the employees of statewide-licensed mechanical contractors as a condition of working for that contractor.

The Louisiana State Licensing Board for Contractors (LSLBC) issues it.

An HVAC business licenses under the Mechanical major classification (code 6) or the narrower subclassification the board lists as "Heat, Air Conditioning, Ventilation, Duct Work, and Refrigeration" (code 6.1); both are trade-exam classifications.

The Mechanical classification covers hydraulic and pneumatic systems, including such components as heating, ventilation, air conditioning, refrigeration, hydronic and steam systems.

The commercial license also carries a financial test: an applicant must submit a financial statement showing at least $50,000 net worth, current within 12 months.

Every LSLBC license applicant must designate a qualifying party — the qualifier — for each classification and for the Louisiana business and law requirement, and that party can be any principal of the company or a full-time employee.

An employee serving as the qualifying party must work at least 32 hours per week and meet the IRS definition of an employee.

The qualifying party is also the person who registers for the trade exam: trade exam fees are paid directly to PSI when the qualifying party registers.

A minimum-experience rule for the Mechanical qualifying party is not established in our research — ask the board what it currently requires before you file.

The law does say a qualifying party may also be a qualifying party for any subsidiary of a licensee.

Two things stand between you and the license.

First, the trade exam where your classification requires one: since August 5, 2025, all LSLBC trade exams are administered by PSI, and trade exam fees are paid directly to PSI when the qualifying party registers.

Second, Business and Law: LSLBC's requirement is an online, one-hour course with an exam on the course's contents at its conclusion, carrying a $150 course fee as of the form revised January 30, 2026.

Where no trade exam is required — for example under the exam-based reciprocity described below — the board charges a $150 Exam Research/Waiver Fee.

One trap for out-of-state owners: the board gives NASCLA exam credit only for its Building Construction/Residential Construction and Electrical exams; NASCLA does not substitute for the Mechanical trade exam.

The sources we read say little here, so verify with the board before you rely on it.

For commercial mechanical (HVAC) licenses, our research found no state-set surety bond amount and no state insurance minimum stated — the LSLBC documents we read state none for these classifications, so ask the board what it currently requires.

The statutory insurance minimum Louisiana does set — $500,000 in general liability plus workers' compensation — attaches to the board's residential, mold and home-improvement licenses, not specifically to commercial mechanical licenses.

Commercial mechanical applicants do clear a financial test, the $50,000 net-worth statement described above, but that is a net-worth rule, not insurance.

Louisiana's contractors statute caps the board's fees rather than fixing them: the caps are $50 for an exam, $100 for a license and $100 for a renewal, and the statute requires an additional $100 fee on each license renewal.

These are statutory maxima — the board's current fee schedule did not turn up in our research, so confirm actual fees with the LSLBC before you budget.

Licenses can be renewed for one-, two- or three-year terms and expire on the anniversary of original issue; renewal opens 60 days before expiry and is impossible after the license has been expired one year.

Continuing education: none for commercial licensees, which include commercial mechanical contractors — only residential building contractors must complete 6 hours of CE a year.

Not through the old agreements — those are gone.

Since October 23, 2024, the LSLBC accepts a trade exam passed in any other state for an equivalent Louisiana classification, provided the applicant passed that test with no waivers, exemptions, or grandfathering in effect, and the board's letter says this change renders any previous agreements null and void.

The board's letter adds that all other licensing requirements still apply.

NASCLA is a separate point: its exam credit reaches only Building Construction/Residential Construction and Electrical, not Mechanical.

Notify the board and move fast — Louisiana gives you fixed windows.

When the qualifying party is no longer associated with the license, the licensee must notify the board within thirty days of the disassociation, and another qualifying party must qualify within sixty days.

Until the replacement qualifies, the company may continue existing work or bid on new work in the licensed trade classifications, but it may not begin such work.

That window is the reason to recruit the next qualifier before the current one gives notice.

Customers and general contractors can also see who qualifies your license: the LSLBC's public search includes a search by qualifying party.

Yes: the LSLBC license requirement applies to mechanical projects exceeding $10,000 including labor and materials — the same line the board states for electrical and plumbing work.

The exact wording matters at the margin: the board's license page says "exceeding $10,000", while the statute's own definitions read "ten thousand dollars or more", so treat a job near the line as a question for the board.

There is a second trigger on the plumbing side: a mechanical contractor who performs plumbing work for which the project value is $10,000 or more must also possess a master plumber license from the State Plumbing Board of Louisiana.

The City of New Orleans requires mechanical contractors performing work within the city to obtain and renew annually its own Mechanical Contractor License — the Class "A" Master (A/C, Refrigeration, and Gasfitters) Mechanical Contractor License — and only one Class "A" license holder is allowed per company.

For the A/C and refrigeration license, an applicant submits a passing ICC G29 Master Mechanical exam results report or, if state tested, a copy of the LSLBC statewide license qualifying-party letter.

These city requirements are separate from the state license, so confirm the current rules with the City of New Orleans before your first job inside the city limits.