Louisiana HVAC License Requirements (2026)

Louisiana licenses HVAC contractors at the state level through the Louisiana State Licensing Board for Contractors (LSLBC) under the Specialty - Mechanical Work classification, governed by La. R.S. 37:2150 et seq. The Mechanical Work classification covers heating, ventilation, air conditioning, refrigeration, and process piping. A license is required for any commercial HVAC project of $50,000 or more, any residential HVAC project of $75,000 or more, and any HVAC work involving hazardous materials regardless of value. The qualifying party must demonstrate at least five years of practical mechanical experience and pass both the PSI/ICC Mechanical Work trade examination and the Louisiana Business and Law examination. EPA Section 608 universal certification is separately required at the federal level for any technician handling refrigerants.

The Licensing Authority

Authority over this credential rests with Louisiana State Licensing Board for Contractors (LSLBC), which issues and polices it under La. R.S. 37:2150 et seq.; LAC Title 46:XXIX (LSLBC rules). LSLBC licenses commercial, residential, and specialty contractors statewide, administers classification examinations through PSI/ICC, and conducts disciplinary proceedings under La. R.S. 37:2150 et seq.

Official portal: https://www.lslbc.louisiana.gov/
Address: 2525 Quail Drive, Baton Rouge, LA 70808
Phone: (225) 765-2301

Baseline Eligibility

The threshold requirements are straightforward: age 18 or above, plus a valid Social Security Number. No Louisiana residency requirement; out-of-state firms must register with the Louisiana Secretary of State and appoint a registered agent.

Good moral character

LSLBC reviews each qualifying party for fitness. Felony convictions and prior license revocations are reviewed individually by the Board.

Background investigation

Mandatory criminal history disclosure on the application; LSLBC may request additional documentation or court records.

Experience and Education Requirements

A minimum of five years of practical mechanical (HVAC/R) experience for the qualifying party, documented through prior employer affidavits and pay records must be documented and verified. Unless the board publishes a different lookback period, applicants should keep payroll, tax, project, or supervisor records that support the claimed experience.

Accepted proof of experience or eligibility

LSLBC Experience Verification Form signed by each prior licensed mechanical contractor
W-2 statements, pay stubs, or 1099 records covering the five-year period
Approved HVAC apprenticeship or NATE certification records
EPA Section 608 universal certification card

Education substitution

Approved HVAC apprenticeship and accredited HVAC/R technical program coursework substitute for portions of the experience requirement at LSLBC discretion.

The Licensing Examination

Testing is handled by PSI Services LLC and ICC (under contract to LSLBC). The applicant has to pass each part listed here before the credential is granted:

Louisiana Business and Law Examination — 50 questions, 120 minutes, passing score 70%
Louisiana Mechanical Work Trade Examination (PSI/ICC) — 100 questions, 240 minutes, passing score 70%

Examination fee: $120 per exam part paid to PSI on the day of testing.

Retake policy: Failed parts may be re-taken individually after a 30-day wait by paying a new $120 fee. Each application remains valid for one year from filing.

Financial Security and Insurance

There is no statewide surety bond tied to this credential in the cited record. Bonding can still surface at the project level — permit, license, or public-works bonds — so check before you bid.

General liability

LSLBC does not impose a state-level general liability minimum. Most commercial owners contractually require $1,000,000/$2,000,000.

Workers' compensation

Workers' compensation insurance is mandatory in Louisiana under La. R.S. 23:1031 et seq. for any business with one or more employees, with no small-employer exemption.

Additional financial requirements

Minimum $10,000 net worth verified by a sworn CPA-reviewed or audited financial statement filed with the application. Statements older than twelve months are rejected.

Fee Schedule

Fee	Amount
Application (non-refundable)	$100
Examination	$240
Initial license	$100
Renewal (every year)	$100

License Renewal

The Louisiana Mechanical Work Specialty Contractor (LSLBC) must be renewed every year. The fee to renew is presently $100. LSLBC mechanical contractor licenses renew annually on the anniversary date.

Continuing education: No state-mandated continuing education for the LSLBC mechanical contractor license. EPA Section 608 certification does not expire.

Downloadable Asset

2026 Louisiana HVAC License Roadmap (PDF) — a printable step-by-step checklist for the application process.

Download the PDF roadmap →

Reciprocity Map

Louisiana grants no NASCLA reciprocity for this classification.

Reciprocal State	Accepted Exam	Conditions
Alabama	Trade exam waived	Bilateral LSLBC–Alabama HVACR Contractors Board reciprocity for active mechanical contractors in good standing.
Mississippi	Trade exam waived	Bilateral LSLBC–Mississippi State Board of Contractors reciprocity for active mechanical contractors.
Texas	Trade exam waived	Bilateral reciprocity with the Texas Department of Licensing and Regulation Air Conditioning and Refrigeration Program.
Arkansas	Trade exam waived	Bilateral LSLBC–Arkansas HVACR Licensing Board reciprocity for active mechanical contractors.

LSLBC does not accept the NASCLA Accredited Examination for the Mechanical Work classification. The Louisiana Business and Law examination is required even when the trade exam is waived through bilateral reciprocity.

Weighing more than one jurisdiction? The national hub compares HVAC license requirements in every state — exam, bond, fee, and experience thresholds side by side.

The Licensing Roadmap

Document five years of mechanical experience. Collect prior employer affidavits, W-2s, and apprenticeship records covering the five-year qualifying period.
Obtain EPA Section 608 universal certification. Federal requirement for any technician handling refrigerants. Required before LSLBC will license a mechanical business.
Form the legal entity and register. Out-of-state entities must register with the Louisiana Secretary of State and appoint a registered agent.
Designate the qualifying party. The qualifying party must be an owner, officer, or full-time employee of the licensed entity and must sit for the trade exam.
Prepare the financial statement. CPA-reviewed or audited statement showing minimum $10,000 net worth, dated within the past twelve months.
Submit the LSLBC application and pass both exams. File with the application fee, financial statement, experience documentation, and workers compensation certificate. Score 70% or better on the Business and Law and Mechanical Work trade exams.
Receive the LSLBC license. LSLBC issues the license at the next regularly scheduled Board meeting. The license must be renewed annually.

Preparation Resources

The list below collects the board's cited references and the materials applicants typically study from. CLR is not paid to recommend any of them.

International Mechanical Code (current Louisiana-adopted edition) — International Code Council. Primary technical reference for the Mechanical Work trade exam. Open-book at the PSI test center.
NASCLA Contractors Guide to Business, Law and Project Management — Louisiana edition — NASCLA. Standard reference for the Louisiana Business and Law portion.
EPA Section 608 Technician Certification Study Guide — ESCO Institute. Required federal certification for any technician handling refrigerants.

Before Filing: A Checklist

Have each of the following squared away before the packet goes to LSLBC:

☐ LSLBC application with $100 fee and qualifying party designation
☐ Five years of documented mechanical experience
☐ EPA Section 608 universal certification card
☐ CPA-reviewed or audited financial statement showing $10,000 net worth
☐ Louisiana Business and Law exam pass certificate at 70%+
☐ PSI/ICC Mechanical Work trade exam pass certificate at 70%+
☐ Workers compensation coverage certificate

Common Application Pitfalls

The errors below are the ones that most frequently cost Louisiana HVAC applicants time, drawn from the cited board guidance.

Forgetting EPA 608

EPA Section 608 universal certification is a separate federal requirement. LSLBC will not license a mechanical business whose technicians lack it.

Stale financial statement

LSLBC rejects any financial statement older than twelve months. Order the CPA review early.

Underdocumenting experience

Five years must be supported by prior employer affidavits and pay records. Self-certification is not accepted.

Missing the Business and Law exam

Even reciprocal applicants must pass the Louisiana Business and Law exam. It is the most commonly overlooked requirement.

Workers compensation gap

Louisiana requires workers compensation for any business with one or more employees, with no small-employer exemption. Lapses suspend the license.

Other Louisiana Trade Licenses

CLR maintains guides for additional Louisiana trades; the published ones are listed here:

Answers to Common Questions

When do I need a Louisiana HVAC contractor license?

Any commercial mechanical project of $50,000 or more, any residential mechanical project of $75,000 or more, and any mechanical work involving hazardous materials regardless of value requires the LSLBC Mechanical Work Specialty license.

How many years of experience does Louisiana require for an HVAC contractor license?

Five years of practical mechanical (HVAC/R) experience for the qualifying party, documented through prior employer affidavits and pay records. Approved apprenticeship may substitute for portions at Board discretion.

Is EPA Section 608 certification required separately?

Yes. EPA Section 608 universal certification is a federal requirement for any technician handling refrigerants. It is required in addition to the LSLBC Mechanical Work license.

Does Louisiana reciprocate HVAC contractor licenses?

Yes. LSLBC maintains bilateral reciprocity with Alabama, Mississippi, Texas, and Arkansas for active mechanical contractors. The Louisiana Business and Law exam is still required.

How often does the Louisiana HVAC contractor license renew?

Every year on the anniversary date. Renewal requires payment of the $100 fee and current workers compensation coverage.

Primary Sources

Regulatory requirements on this page are drawn from the official board, statute, and exam-provider materials listed below.

Verified 2026-05-31 · Next scheduled review 2026-08-29