Louisiana · Plumbing licensing

How to Get a Plumbing License in Louisiana (2026 Guide)

Verified against 6 official sourcesReviewedNext review·Confidence: medium
State license
Required (state)
Renewal
$100.00

Louisiana PLUMBING overview

Quick facts

Tiers
Info
Mechanical (Major 6) / Plumbing (Major 7)
Examination fee (statutory max)
Info
$50.00
License fee (statutory max)
Info
$100.00

Navigating contractor licensing in Louisiana requires understanding requirements from the Louisiana State Licensing Board for Contractors (LSLBC) for your company license. For plumbing work specifically, a crucial extra step involves the State Plumbing Board of Louisiana, which licenses the individual Master Plumber needed for projects over a certain value. This guide breaks down both processes, covering classifications, fees, exams, and insurance to ensure you are fully compliant.

Do You Need a Mechanical or Plumbing Contractor License in Louisiana?

Yes, a state license is required to perform commercial mechanical or plumbing work in Louisiana. The Louisiana State Licensing Board for Contractors (LSLBC) issues licenses to contracting companies for projects where the value of labor and materials exceeds specific thresholds. Individual plumbers, particularly those acting as the responsible party for a company, may also need a Master Plumber license from the State Plumbing Board of Louisiana.

Louisiana Mechanical and Plumbing Contractor License Classifications (LSLBC)

The Louisiana State Licensing Board for Contractors (LSLBC) offers two primary classifications for contractors performing mechanical and plumbing work.

Major Classification 6: Mechanical Contractor

This classification authorizes a broad scope of work, including HVAC, refrigeration, process piping, gas piping, and plumbing. A company holding a Mechanical Contractor license can perform plumbing work as part of larger mechanical projects.

Major Classification 7: Plumbing Contractor

This classification is specific to plumbing work. It allows a contractor to bid on and perform projects that are exclusively or primarily plumbing-related. As with the Mechanical classification, the Qualifying Party for a Plumbing Contractor must also hold a Master Plumber license from the State Plumbing Board of Louisiana for any plumbing work valued over $10,000.

Master Plumber License (State Plumbing Board of Louisiana)

The Master Plumber license is a separate, individual license issued by the State Plumbing Board of Louisiana (SPBLA), not the LSLBC. It is required for the individual who acts as the Qualifying Party for an LSLBC-licensed company performing plumbing work over $10,000. This license demonstrates an individual's personal competency in the plumbing trade.

Louisiana Contractor License Requirements: What You Need to Know

To obtain a commercial contractor license from the LSLBC, your company must meet several key requirements, primarily through its designated Qualifying Party.

Business Registration and Structure

Your contracting business must be registered and in good standing with the Louisiana Secretary of State. You will need to provide your business entity's legal name and registration details on your application.

Designate a Qualifying Party

Every licensed contracting company must have at least one Qualifying Party. This individual is legally responsible for the projects undertaken by the company and must meet the board's experience and examination requirements.

Experience Requirements for the Qualifying Party

The LSLBC requires the Qualifying Party to demonstrate sufficient experience in the trade. A common path to demonstrate this is by providing evidence of at least four years of journeyman-level experience or equivalent vocational credentials in the specific classification being sought.

For plumbing work over $10,000, the Qualifying Party must also hold a Master Plumber license with the State Plumbing Board of Louisiana. The experience requirements for this license are set by the SPBLA. Confirm the current year and hour minimums with both the LSLBC and the State Plumbing Board before applying.

Financial Statement Requirements

Applicants must submit a financial statement to the LSLBC to demonstrate the company's financial stability. The type of statement required (e.g., compiled, reviewed, or audited) depends on the scope and limitations of the projects you intend to undertake.

General Liability Insurance and Workers' Compensation

Contractors must maintain general liability insurance and provide proof to the LSLBC at the time of application and renewal.

  • General Liability: A minimum of $100,000 in coverage is required. The LSLBC must be named as a certificate holder on the policy.
  • Workers' Compensation: Proof of workers' compensation insurance is required if the contractor has any employees.
  • Exemption: Inactive licensees are exempt from submitting insurance certificates.

Surety Bond Requirements

No surety bond is required at the state level by the LSLBC for a Mechanical or Plumbing contractor license.

How to Apply for Your Louisiana Contractor License (Step-by-Step)

Follow these steps to apply for your commercial contractor license with the LSLBC.

  1. Confirm Classifications: Determine whether you need the Mechanical (Class 6), Plumbing (Class 7), or both classifications for your scope of work.
  2. Register Your Business: Ensure your business entity is properly registered with the Louisiana Secretary of State.
  3. Gather Qualifying Party Documents: Collect work history affidavits, experience verification, and any other documents required for your Qualifying Party.
  4. Prepare Financial Statements: Have your company's financial statement prepared by a certified public accountant.
  5. Obtain Insurance: Secure your general liability and, if applicable, workers' compensation insurance certificates, making sure the LSLBC is listed as a certificate holder.
  6. Complete the LSLBC Application: Fill out the official application form for a commercial contractor license, available on the LSLBC website.
  7. Pay Application Fees: Submit the required application fees with your form.
  8. Schedule and Pass Exams: Once your application is approved, your Qualifying Party will be eligible to schedule and pass the required exams.
  9. Submit All Supporting Documents: Ensure all required documentation is submitted to the board.
  10. Await Board Approval: The LSLBC will review your complete application package and issue your license upon approval.

For the required Master Plumber license, you must apply separately through the State Plumbing Board of Louisiana. This process involves a separate application, exam, and fee schedule.

Louisiana Contractor License Exam Details

The Qualifying Party must pass two separate exams administered on behalf of the LSLBC.

Required Exams

  • Trade Exam: This exam covers technical knowledge specific to the classification, such as Mechanical or Plumbing. The content is based on industry standards and the Louisiana Plumbing Code.
  • Business and Law Exam: This exam covers general business practices, regulations, and laws relevant to contracting in Louisiana.

The Master Plumber exam is a separate examination process administered by the State Plumbing Board of Louisiana.

Exam Provider and Locations

LSLBC exams are administered by PSI. Candidates can find testing locations and schedule their exams through the PSI website after receiving approval from the LSLBC. The official Candidate Information Bulletin with exam details is available at test-takers.psiexams.com/lacon.

Exam Content and Study Resources

The PSI Candidate Information Bulletin is the primary source for exam content outlines, scoring information, and a list of approved reference materials. References for the plumbing exam typically include the Louisiana Plumbing Code, which adopts the International Plumbing Code with state-specific amendments.

Exam Fees and Scheduling

Per La. R.S. 37:2156.C, the maximum fee for an LSLBC examination is $50.00. You must pay the fee directly to the testing provider when you schedule your exam.

How Much Does a Louisiana Contractor License Cost?

The total cost to get a Louisiana mechanical or plumbing contractor license includes application, exam, and initial licensing fees, in addition to business costs like insurance and financial statement preparation.

Application Fees

The LSLBC commercial contractor application fee is $100 per classification.

Exam Fees

The maximum fee for each LSLBC exam (Trade and Business and Law) is $50.00.

Initial License Fees

The maximum fee for the initial issuance of an LSLBC license is $100.00.

Renewal Fees

The maximum fee for renewing an LSLBC license is $100.00.

Other Potential Costs

Remember to budget for other expenses, such as:

  • Business registration fees
  • Costs for preparing financial statements
  • Insurance premiums
  • Exam preparation materials and reference books

Renewing Your Louisiana Contractor License

Maintaining your LSLBC license requires timely renewal and adherence to ongoing requirements.

Renewal Cycle and Deadlines

LSLBC licenses are renewed based on the anniversary of the date the license was originally issued. Licensees may elect a 1-year, 2-year, or 3-year renewal term, with the cycle set upon initial licensing.

Renewal Process

You can renew your license online or by mail through the LSLBC portal. You must provide an updated insurance certificate and pay the renewal fee.

Continuing Education Requirements

There is no state-level continuing education required by the LSLBC for commercial mechanical or plumbing licensees. However, you should always check with local municipalities or parishes where you work, as they may have their own CE requirements.

Delinquent Renewal Fees

If you fail to renew your license on time, you will be charged a delinquent fee. The maximum delinquent fee set by state law is $50.00.

Louisiana Contractor License Reciprocity

Louisiana offers a path for contractors licensed in other states to obtain an LSLBC license by waiving a portion of the examination requirement.

Per La. R.S. 37:2153(5), the LSLBC may grant reciprocity to applicants holding a comparable license in another state with similar requirements. This allows for the waiver of the trade portion of the exam. However, the Business and Law exam is not waived and must be passed by all applicants.

Reciprocity Requirements

To qualify for reciprocity, you must:

  • Hold a current, active license in a state with a formal reciprocity agreement with Louisiana.
  • Provide a written certification of good standing and exam passage from your home state's licensing board.
  • Complete the LSLBC application and meet all other requirements, including insurance and financial stability.

You must confirm the list of current reciprocal states directly with the LSLBC before applying.

Resources and Next Steps

The official websites of the licensing boards are the definitive sources for all forms, regulations, and updates.

  • Louisiana State Licensing Board for Contractors (LSLBC): The primary authority for company licensing, applications, exams, and renewals.
  • State Plumbing Board of Louisiana (SPBLA): The authority for individual Master Plumber licensing.

Always refer to these sources to verify the latest requirements before submitting an application or payment.

Requirement

Louisiana Insurance & Bond Requirements

General liability insurance required, minimum $100,000, with the LSLBC named as certificate holder, submitted during both application and renewal. Workers' compensation required if the contractor has employees. Inactive licensees are exempt from submitting insurance certificates. No surety bond is required at the LSLBC level.

Always confirm current coverage and bond minimums with the issuing authority before purchasing a policy.

Louisiana Plumbing licensing

Common questions

Do you need a license to do Plumbing work in Louisiana?

Yes. Louisiana requires a state-issued Plumbing contractor license to perform Plumbing work. Louisiana licenses the company; the company must designate a Qualifying Party who passes the LSLBC trade exam and the Business and Law exam. Per LAC 46:XXIX Ch. 1 and LSLBC practice, a common path is at least four years of journeyman-level experience (or equivalent vocational credentials) in the trade. Per the LSLBC exams-classifications page, a Mechanical contractor who performs plumbing work over $10,000 must also possess a master plumber license with the State Plumbing Board of Louisiana. Confirm the current year / hour minimums with LSLBC and the State Plumbing Board.

How much does an Plumbing license cost in Louisiana?

La. R.S. 37:2156.C sets the maximum LSLBC license fees at: Examination $50.00, License $100.00, Renewal $100.00, Delinquent $50.00. Non-Louisiana-domiciled applicants pay an additional board-set surcharge of up to $400 per application. Licensees may elect a 1-, 2-, or 3-year renewal term. Commercial contractor application fee is $100 per classification (per the LSLBC FAQ / apply-for-a-license page).

How often do you renew an Plumbing license in Louisiana?

Licensees may elect a 1-year, 2-year, or 3-year renewal term on the anniversary of the date the license was originally issued (LSLBC sets the cycle on initial licensing).

Does a Louisiana Plumbing license transfer to other states?

Per La. R.S. 37:2153(5), the Board may waive the trade portion of the exam for applicants holding a comparable classification license in another state (with written certification of good standing and exam passage); the Business and Law exam is not waived. Confirm current reciprocal states with LSLBC.

Frequently Asked Questions

What is a Qualifying Party for a Louisiana contractor license?

A Qualifying Party is an individual designated by a contracting company who meets the state's experience requirements and passes the necessary exams (both trade and Business and Law). This person is legally responsible for the work performed under the company's license.

What is the difference between an LSLBC Plumbing Contractor license and a Master Plumber license?

The LSLBC Plumbing Contractor license is issued to a company, allowing it to legally bid on and perform commercial plumbing projects. The Master Plumber license is issued by the State Plumbing Board of Louisiana to an individual, certifying their personal trade competency. A company performing plumbing work over $10,000 must have a Qualifying Party who holds a Master Plumber license.

Do I need a separate license for HVAC and plumbing work in Louisiana?

No, the Major Classification 6: Mechanical Contractor license issued by the LSLBC covers HVAC, refrigeration, and plumbing work. However, if you perform plumbing work valued at over $10,000 under this license, your Qualifying Party must also hold a Master Plumber license from the State Plumbing Board of Louisiana.

What are the experience requirements for an LSLBC Mechanical or Plumbing license?

A common path is for the Qualifying Party to demonstrate at least four years of journeyman-level experience or an equivalent combination of vocational training and experience. You must confirm the current specific requirements with the LSLBC.

What exams are required for a Louisiana Mechanical or Plumbing contractor license?

The Qualifying Party must pass two exams administered by PSI on behalf of the LSLBC: a trade-specific exam (e.g., Mechanical or Plumbing) and the Business and Law exam. A separate exam is required to obtain the Master Plumber license from the State Plumbing Board of Louisiana.

What are the general liability insurance requirements for contractors in Louisiana?

Licensed contractors must carry a minimum of $100,000 in general liability insurance. The Louisiana State Licensing Board for Contractors (LSLBC) must be named as a certificate holder on the policy.

Is a surety bond required for a Louisiana LSLBC Mechanical or Plumbing license?

No, the LSLBC does not require a surety bond for the Mechanical or Plumbing classifications at the state level.

How do I renew my Louisiana plumbing license for 2026?

To renew your LSLBC license, you will follow the standard renewal process on or before your license's anniversary date in 2026. This typically involves submitting a renewal application, paying the fee, and providing an updated certificate of insurance. Renewals can be done online through the LSLBC portal.

When do 2026 Louisiana plumbing licenses need to be renewed?

LSLBC licenses are renewed based on the anniversary of their original issuance date, not on a fixed calendar date. Your license's specific expiration date will be printed on the license itself. You can choose a 1-, 2-, or 3-year renewal term.

Are continuing education credits required for Louisiana LSLBC licenses?

The LSLBC does not require continuing education for the renewal of commercial Mechanical or Plumbing contractor licenses at the state level. However, you should check for any requirements imposed by local municipalities or parishes where you conduct business.

Does Louisiana have reciprocity for contractor licenses?

Yes, Louisiana has reciprocity agreements with several other states. These agreements may waive the trade portion of the LSLBC exam, but all applicants must still pass the Louisiana Business and Law exam. You must confirm the current list of reciprocal states directly with the LSLBC.

How Louisiana compares

Louisiana vs. other state licensing rules

Use this quick comparison to jump to nearby state requirements or see where rules differ.

StateLicenseClassesExamRenewal
Louisiana This guideRequired2 classesPSI (Trade + Business/Law)Licensees may elect a 1-year, 2-year, or 3-year renewal term on the anniversary of the date the license was originally issued (LSLBC sets the cycle on initial licensing).
AlabamaRequired5 classesRequiredAnnual
ArizonaRequired3 classesRequiredEvery 2 years
ArkansasRequired5 classesADH-administered (monthly at ADH Auditorium)Annual (Dec 31, late fee $5/mo after Feb 1)
CaliforniaRequired1 classesRequiredEvery 2 years (active) / 4 years (inactive)

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Official sources

Next source review due 2026-12-22. Last reviewed 2026-06-22. Confirm current requirements with the official licensing authority before applying.