Louisiana Mechanical Contractor License — HVAC Requirements

HVAC and mechanical work in Louisiana falls under the LSLBC's specialty trade licensing framework. If the contract value of a mechanical project exceeds $10,000 — including all labor and materials — the contractor must hold a state mechanical specialty license.

The $10,000 Threshold

Louisiana groups electrical, mechanical, and plumbing under a single $10,000 licensing trigger. For mechanical contractors, this covers HVAC system installation, ductwork, refrigeration systems, and related equipment on both commercial and residential projects.

A residential HVAC replacement that includes the equipment, ductwork modifications, and installation labor commonly runs $8,000-$15,000, which means most standalone HVAC jobs cross the licensing threshold. Only very minor repairs and maintenance consistently stay below $10,000.

LSLBC Mechanical Classifications

The LSLBC organizes mechanical work under specialty classifications. Mechanical contractors apply for the specific scope that matches their work:

• Mechanical work on commercial projects falls under the Commercial specialty classifications
• Mechanical work on residential new construction requires the appropriate residential subclassification
• Mechanical work on existing residential structures under $50,000 may fall under Home Improvement Registration, but the $10,000 trade-specific threshold for mechanical work takes precedence

The classification you select on your application determines the scope of work your license authorizes. Performing work outside your classification — for example, a mechanical contractor doing electrical rough-in — is a board violation even if you hold a valid license for your own trade.

Licensing Requirements

The mechanical contractor licensing pathway follows the standard LSLBC process:

Business formation. Register your LLC or corporation through GeauxBiz and obtain your Charter Number and EIN.

Financial statement. Demonstrate $50,000 minimum net worth through a CPA-prepared financial statement. This requirement applies to all major and specialty classifications.

Qualifying party. Designate a qualifying party with verifiable experience in mechanical/HVAC work. The QP must complete the background verification process through the LSLBC portal.

Trade exam. Pass the mechanical trade exam administered by PSI Services. Testing centers are located in Baton Rouge, Lafayette, Lake Charles, Metairie, Monroe, Pineville, and Shreveport. Exam fees range from $120 to $175 depending on the classification.

Business & Law course. Complete the online course through the LSLBC portal and score 70% or higher on the 50-question exam.

Insurance filing. Commercial mechanical contractors are exempt from filing GL insurance directly with the LSLBC, but must carry coverage for local permit requirements and client contracts. If your mechanical work includes any residential scope, you must file $500,000 in GL and workers' compensation with the board.

The NASCLA Option for Commercial Work

If you are pursuing commercial work and may work across state lines, consider the NASCLA (National Association of State Contractors Licensing Agencies) accredited examination. Passing the NASCLA exam satisfies the trade-testing requirement for the major Building Construction classification in Louisiana and provides a pathway to reciprocal licensing in other participating states.

This can save significant time and money if you plan to bid on industrial or commercial work in neighboring states that also accept the NASCLA credential.

Local Parish Requirements

A state mechanical license does not replace local requirements. Most parishes require separate trade-specific permits for mechanical work, with plan reviews that average 5-10 business days. In New Orleans, mechanical contractors must register through the One Stop App and may need a Class A Mechanical local classification. In East Baton Rouge, a $5,000 local surety bond is required for mechanical and electrical contractors.

The Louisiana General Contractor License Guide covers the mechanical specialty path alongside all LSLBC license types, with side-by-side comparisons of the financial, testing, and insurance requirements for each classification.

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