Louisiana

Louisiana uses a dual-board model. The Louisiana State Licensing Board for Contractors (LSLBC) regulates commercial, industrial, highway, residential, and specialty construction. The State Plumbing Board of Louisiana (SPBLA) regulates plumbing separately — and plumbers must hold an SPBLA license before they can obtain an LSLBC contractor license for plumbing work.

Always verify statutes, fees, and application details with the live regulator before making bidding, licensing, or legal decisions.

At a glance

The fastest way to orient yourself in Louisiana is to know that different work types trigger at different dollar levels, and plumbing runs through a separate board entirely.

Signal	Value
Commercial, industrial, and highway construction trigger	$50,000 or more
Electrical and mechanical work trigger	Exceeding $10,000
Home improvement trigger	More than $7,500 but not exceeding $50,000
New home subcontractor trigger (listed trades)	Over $7,500
Hazardous material and mold remediation trigger	$1 or more
Plumbing regulator	Separate board — State Plumbing Board of Louisiana
Reciprocity model	LSLBC accepts exam scores from any state; SPBLA has Texas and Arkansas agreements

Frequently asked questions

Pick the tab that matches your situation. Each FAQ gives a direct answer and points you to the full detail below.

Contractors
Regulators

At what contract value does Louisiana require a contractor license?

It depends on the work type. Commercial, industrial, and highway construction triggers at $50,000 or more. Electrical and mechanical work (including plumbing) triggers above $10,000. Home improvement contracts trigger between $7,500 and $50,000. Hazardous material and mold remediation triggers at $1 or more — effectively all projects. See Construction work regulated.

Do I need a separate plumbing license from a different board?

Yes. Plumbing is regulated by the State Plumbing Board of Louisiana (SPBLA), which is completely separate from LSLBC. If you need an LSLBC contractor license for plumbing work, you must obtain the SPBLA license first — the two credential tracks are sequential, not parallel. See Construction work regulated.

Where do I go to get licensed in Louisiana?

Louisiana has 2 main regulatory boards. LSLBC handles general, commercial, residential, highway, and specialty contracting at 600 North Street, Baton Rouge. SPBLA handles plumbing, gas fitting, and water supply at 11304 Cloverland Avenue, Baton Rouge. See Who regulates construction.

How much does it cost to get licensed?

LSLBC classification fees range from $100 (1 classification) to $400 (5 or more). Trade exam is $150 per classification. Business and Law course is $150. Background financial investigation is $50. Out-of-state contractors pay an additional $400 surcharge. See Requirements.

What are the insurance requirements?

Residential building contractors and home improvement registrants must carry workers’ compensation and general liability insurance of at least $100,000. Mold remediation contractors need general liability of at least $50,000. Additional requirements may apply by classification. See LSLBC Commercial Contractors.

Can I use my out-of-state license in Louisiana?

LSLBC has one of the broadest reciprocity models — it accepts passing exam scores from any state, as long as the classification required a test (no waivers, exemptions, or grandfathering). LSLBC also accepts the NASCLA Accredited Exam. All other requirements (financial statements, insurance, Business and Law course) still apply. Budget for the $400 out-of-state surcharge. See Reciprocal agreements.

What about plumbing reciprocity?

SPBLA has reciprocity with Texas and Arkansas for journeyman plumbing. Texas and Arkansas journeymen in good standing are eligible for both natural gas fitter and journeyman plumbing licenses in Louisiana without exam. See Reciprocal agreements.

What are the requirements for residential subcontractors?

Subcontractors on new homes in listed trades (framing, masonry/stucco, slabs/foundations, pile driving, roofing, swimming pools) require licensing when the contract exceeds $7,500. See Construction work regulated.

Does Louisiana require licensing for roofing work?

Roofing is a specialty classification under building construction at LSLBC. Commercial roofing triggers at $50,000 or more. Residential roofing on new homes triggers at $7,500 as a listed subcontractor trade. Home improvement roofing triggers between $7,500 and $50,000. See Construction work regulated.

What about hazardous material or mold remediation work?

Licensing is required at $1 or more — effectively all projects. Mold remediation contractors must carry general liability insurance of at least $50,000. Route to LSLBC for the hazardous materials major classification. See Common determination scenarios.

What is the NASCLA exam path?

LSLBC accepts the NASCLA Accredited Examination for commercial general building, electrical, and residential building contractors. This provides a standardized exam path for contractors from any state. All other LSLBC requirements still apply. See Requirements.

How does Louisiana's dual-board model compare to single-board states?

Louisiana’s separation of plumbing regulation (SPBLA) from all other construction licensing (LSLBC) is distinctive. Most states either include plumbing within a single contractor board or house it in a separate trade-specific division. The sequential requirement (SPBLA license before LSLBC plumbing license) adds a compliance step not found in most states.

How do Louisiana's dollar thresholds compare to other states?

Louisiana uses a tiered threshold model with 5 different triggers: $50,000 (commercial), $10,000 (electrical/mechanical), $7,500 (home improvement and new home subs), and $1 (hazmat/mold). The $1 threshold for hazmat/mold is effectively the lowest in the country. For cross-state comparison, see Licensing thresholds.

How is contractor licensing divided between LSLBC and SPBLA?

LSLBC handles all construction licensing except individual plumber credentialing: commercial, industrial, highway, residential, electrical, mechanical, hazmat, and specialty classifications. SPBLA handles the individual plumbing credential progression (apprentice through master). If a contractor needs an LSLBC mechanical-plumbing license, the SPBLA credential must come first.

What is the threshold for home improvement vs. full contractor licensing?

Home improvement contracts between $7,500 and $50,000 require registration or licensing. Contracts at $50,000 or more require a full commercial contractor license. Below $7,500, no state license is required for home improvement work.

What are the fees across classifications?

LSLBC uses tiered classification fees: $100 (1 classification) up to $400 (5+). Trade exam is $150 per classification. Business and Law course is $150. Out-of-state surcharge is $400. SPBLA fees are separate and tied to the credential progression. See Requirements.

What license classifications does Louisiana use?

LSLBC organizes under major classifications: Building Construction, Highway/Street/Bridge, Heavy Construction, Municipal/Public Works, Electrical, Mechanical, Hazardous Materials, and Specialties. Each major classification has multiple specialty subcategories. SPBLA has a progression from apprentice through master plumber plus gas fitter and medical gas credentials. See Types of licenses.

How does reciprocity work in Louisiana?

LSLBC has one of the broadest reciprocity models — it accepts passing exam scores from any state where the classification required a test. SPBLA has targeted reciprocity with Texas and Arkansas for journeyman plumbing. These are independent arrangements. See Reciprocal agreements.

What exam requirements exist?

LSLBC requires a trade exam per classification (NASCLA accepted for commercial general building, electrical, and residential building) plus a Business and Law course. SPBLA requires examinations at the journeyman and master levels. No published minimum exam scores are available for either board in the source material.

What is the plumbing credential progression?

SPBLA uses a progression model: apprentice registration, then residential plumber limited (3,000–4,000 hours), then journeyman plumber (7,000–8,000 hours), then master plumber. Additional credentials include medical gas installer/verifier, master/journeyman natural gas fitter, and WSPS endorsement.

How does the out-of-state surcharge work?

All out-of-state contractors applying to LSLBC pay a $400 surcharge on top of standard application fees. This is in addition to classification fees, exam fees, the Business and Law course fee, and the financial investigation fee. See LSLBC Commercial Contractors.

How does Louisiana compare to other Southern states?

Louisiana’s tiered threshold model (5 different dollar triggers) is more complex than most Southern states. The dual-board structure (LSLBC + SPBLA) and the broad exam-score reciprocity are distinctive. The $1 hazmat/mold threshold captures work that most states leave unregulated. See the South region guide.

Start with your goal

Pick the card that matches what you need right now. Each one links to the relevant section on this page.

Is licensure triggered?

Start with the dollar thresholds and work-lane rules, then confirm which board owns the lane.

Find the right regulator

Use the regulator directory to route your question to LSLBC or the State Plumbing Board.

Application and renewal details

Exams, fees, insurance, experience hours, and classification costs for each trade.

Reciprocity direction

Find out how LSLBC handles out-of-state exam scores and which states have plumbing reciprocity.

Special considerations

Different roles need different things from a Louisiana page. Use the tab that matches your situation to see what matters most before you read the full detail below.

Contractors
Regulators

Start with dollar value and work type. Louisiana has 5 different dollar triggers depending on the kind of work.

Commercial, industrial, and highway construction requires licensing at $50,000 or more.
Electrical and mechanical work (including plumbing) requires licensing above $10,000.
Home improvement contracts between $7,500 and $50,000 require registration or licensing.
Hazardous material and mold remediation projects require licensing at $1 or more — effectively all projects.
Plumbing contractors must hold a State Plumbing Board license before applying for an LSLBC plumbing license.
Out-of-state contractors pay a $400 surcharge on top of standard application fees.
LSLBC accepts the NASCLA Accredited Examination for commercial general building, electrical, and residential building contractors.

Readiness checklist

Four things you need to confirm before you can treat Louisiana as “ready” for a bid or an application. If any of these are unclear, you are not ready yet.

Classify the work type and dollar value

Identify whether the work is commercial, highway, electrical, mechanical, home improvement, hazmat/mold, residential, or specialty — and determine the contract value.

Apply the right dollar threshold

Check $50,000 for commercial/industrial/highway, $10,000 for electrical/mechanical, $7,500 for home improvement, and $1 for hazmat/mold remediation.

Route to the correct board

Plumbing goes to SPBLA first. Everything else goes to LSLBC. If the project involves plumbing as part of a larger contract, both boards may be involved.

Confirm the requirement set

Confirm exams, experience, financial statements, insurance, classification fees, and the out-of-state surcharge ($400) before filing.

If you can identify work type, dollar threshold, the correct board, and the full requirement set, you have the minimum package needed for a Louisiana readiness check.

Use these links to jump to related cross-state comparisons and workflows.

New state evaluation if you are screening Louisiana for the first time.
Multi-state bid readiness if you need to compare Louisiana with nearby jurisdictions.
Licensing thresholds or prequalification patterns for cross-state context.

Construction work regulated

Louisiana uses a tiered threshold model — different work types trigger licensing at different dollar values. The lowest threshold is effectively zero for hazardous material and mold remediation work.

Work lane	What triggers regulation
Commercial, industrial, and highway construction	$50,000 or more
Electrical and mechanical work (including plumbing)	Exceeding $10,000
Home improvement contracts	More than $7,500 but not exceeding $50,000
Subcontractors on new homes (framing, masonry/stucco, slabs/foundations, pile driving, roofing, swimming pools)	Over $7,500
Hazardous material and mold remediation	$1 or more
Plumbing (individual tradesperson licensing)	All work — must hold SPBLA license regardless of contract value

Plumbing contractors must hold a State Plumbing Board license before they can obtain an LSLBC contractor license for plumbing work. The two credential tracks are sequential, not parallel.

Common determination scenarios

If you are trying to figure out where to start, expand the scenario that is closest to your situation.

Commercial or industrial construction project

If the contract is $50,000 or more, an LSLBC commercial license is required. Applicants must complete the Business and Law course, pass the trade exam (or submit a NASCLA score), and provide independently prepared financial statements. Check whether any specialty classifications also apply to the scope of work.

Plumbing work at any dollar level

Route to the State Plumbing Board of Louisiana (SPBLA) first. Individuals must register as an apprentice and progress through residential plumber limited or journeyman plumber before reaching master plumber. If you also need an LSLBC contractor license for plumbing, the SPBLA license must be obtained first.

Home improvement project between $7,500 and $50,000

Register or obtain a license through LSLBC. Residential building contractors and home improvement registrants must carry workers’ compensation and general liability insurance of at least $100,000.

Hazardous material or mold remediation

Licensing is required at $1 or more — effectively all projects. Route to LSLBC. Mold remediation contractors must carry general liability insurance of at least $50,000.

Out-of-state contractor entering Louisiana

LSLBC accepts passing exam scores from any other state for reciprocity — no waivers, exemptions, or grandfathering can be in effect. All other requirements (financial statements, insurance, Business and Law course) still apply. Budget for the $400 out-of-state contractor surcharge on top of standard fees.

Who regulates construction

Louisiana splits construction regulation between two boards. LSLBC handles general, commercial, residential, highway, and specialty contracting. SPBLA handles plumbing and gas fitting as a separate licensing track.

General, commercial, residential, highway, and specialty contracting — Louisiana State Licensing Board for Contractors (LSLBC)

600 North Street, Baton Rouge, LA 70802Phone: (225) 765-2301 | Fax: (225) 381-0682Website: lslbc.gov

Plumbing, gas fitting, and water supply — State Plumbing Board of Louisiana (SPBLA)

11304 Cloverland Avenue, Baton Rouge, LA 70809Phone: (225) 756-3434 | Fax: (225) 756-3433Website: spbla.com

Requirements

Louisiana’s two boards have distinct requirement tracks. LSLBC uses classification-based licensing with a tiered fee structure. SPBLA uses a progression model from apprentice through master plumber.

LSLBC Commercial Contractors

Requirement	Detail
Business and Law course	Required for all applicants
Trade exam	Required per classification; NASCLA Accredited Examination accepted for commercial general building, electrical, and residential building contractors
Financial statements	Independently prepared financial statements required with application
Insurance (residential building / home improvement)	Workers’ compensation and general liability for statutory limits; residential building contractors and home improvement registrants minimum $100,000
Insurance (mold remediation)	General liability minimum $50,000
Out-of-state surcharge	$400 for all out-of-state contractors

Fee	Amount
1 classification	$100
2 classifications	$195
3 classifications	$290
4 classifications	$380
5 or more classifications	$400
Trade exam (per classification)	$150
Business and Law course	$150
Background financial investigation	$50
Out-of-state surcharge	$400

SPBLA — Apprentice through Journeyman Plumber

Requirement	Detail
Apprentice registration	Must register with SPBLA; work under direct supervision of a licensed journeyman or master plumber
Residential plumber limited — hours (RAP)	3,000 hours under a Registered Apprenticeship Program
Residential plumber limited — hours (other)	4,000 hours for all other apprentices
Residential plumber limited — scope	Limited to one- and two-family dwellings
Journeyman plumber — hours (RAP)	7,000 hours under a Registered Apprenticeship Program
Journeyman plumber — hours (other)	8,000 hours for all other apprentices
Journeyman exam	SPBLA examination required
Out-of-state license	Current, valid plumbing license from another state may substitute for work-experience vouchers to qualify for the journeyman exam

SPBLA — Master Plumber and Additional Credentials

Requirement	Detail
Master plumber	Must hold journeyman plumber license; pass master plumber examination
Medical gas installer	SPBLA examination and credential
Medical gas verifier	SPBLA examination and credential
Master natural gas fitter	SPBLA examination and credential
Journeyman natural gas fitter	SPBLA examination and credential
WSPS endorsement	Must hold journeyman plumber, master plumber, or landscape irrigation license; complete Board-approved WSPS certification program through ABPA or ASSE

Reciprocal agreements

Louisiana has two distinct reciprocity tracks. LSLBC broadly accepts passing exam scores from any other state, making it one of the most open reciprocity models in the country. SPBLA has targeted agreements with Texas and Arkansas for plumbing.

LSLBC accepts exam scores from any state — but the classification must have required a test (no waivers, exemptions, or grandfathering), and all other application requirements must still be met.

Board	Reciprocal states	Coverage
Louisiana State Licensing Board for Contractors (LSLBC)	Any state with exam-based licensing	All states (exam-based)
State Plumbing Board of Louisiana (SPBLA)	Texas, Arkansas	2 states

LSLBC exam score reciprocity — how it works

LSLBC will accept a passing exam score from an applicant who holds a classification that required a test in any other state. The exam must have been passed without waivers, exemptions, or grandfathering. LSLBC selects the equivalent classification. All other requirements — financial investigation, insurance, Business and Law course — still apply.

SPBLA plumbing reciprocity with Texas and Arkansas

Texas and Arkansas journeymen in good standing are eligible to obtain the equivalent of both natural gas fitter and journeyman plumbing licenses in Louisiana. No Louisiana exam is required.

Types of licenses

Louisiana’s licensing structure is organized by major classification at LSLBC and by credential level at SPBLA. A contractor holding a major classification is permitted to bid or perform any specialty work listed under that classification.

Building Construction

Driveways, Parking Areas, Asphalt, and Concrete
Drywall
Flooring and Decking
Foundations for Buildings, Equipment, or Machinery
Insulation for Cold Storage and Buildings
Lathing, Plastering, and Stuccoing
Masonry, Brick, Stone
Pile Driving
Pneumatic Tubes and Conveyors
Rigging, House Moving, Wrecking, and Dismantling
Roofing and Sheet Metal, Siding
Steel Erection and Installation
Swimming Pools
Water Cooling Towers and Accessories
Labor Only
Landscaping, Grading, and Beautification

Highway, Street and Bridge

Culverts and Drainage Structures
Driveways, Parking Areas, Asphalt, and Concrete
Earthwork, Drainage, and Levees
Permanent or Paved Highways and Streets (Asphalt)
Permanent or Paved Highways and Streets (Concrete)
Labor Only
Landscaping, Grading, and Beautification

Heavy Construction

Dredging
Electrical Transmission Lines
Foundations and Pile Driving
Industrial Pipe Work and Insulation
Oil Field Construction
Railroads
Wharves, Docks, Harbor Improvements, and Terminals
Labor Only
Landscaping, Grading, and Beautification

Municipal, Electrical, Mechanical

Municipal and Public Works Construction:

Pipe Work (water line)
Labor Only
Landscaping, Grading, and Beautification

Electrical:

Electrical Transmission Lines
Electrical Controls and Instrumentation and Calibration
Telecommunications, Low Voltage
Labor Only

Mechanical:

Heat, Air Conditioning, Ventilation, Duct Work, and Refrigeration
Industrial Pipe Work and Insulation
Plumbing
Labor Only

Hazmat and Specialties

Hazardous Materials:

Asbestos Removal and Abatement
Hazardous Waste Treatment or Removal
Lead Based Paint Abatement and Removal
Underground Storage Tanks
Labor Only

Specialties:

Limited Specialty Services
Auger and Dry Conventional Boring
Carpentry
Coastal Restoration and Habitat Enhancement
Concrete Construction Excluding Highways, Streets, and Bridges
Concrete Reinforcement and Post Tensioning
Curb, Gutter, Driveways, Sidewalks, Retaining Walls, Patios, Foundations
Glass, Glazing, Store Fronts, Metal Partitions, Panels and Siding
Horizontal Directional Drilling
Industrial Cleaning and Material/Waste Handling
Insulation
Painting, Coating, and Blasting
Solar Energy Equipment
Tower Construction
Water Well Drilling
Labor Only

Residential

Residential Swimming Pools
Mold Remediation
Home Improvement

Plumbing (SPBLA)

Apprentice
Residential Plumber Limited
Journeyman Plumber
Master Plumber
Medical Gas Installer
Medical Gas Verifier
Master Natural Gas Fitter
Journeyman Natural Gas Fitter
Water Supply Protection Specialist (WSPS) Endorsement

South region guide

Browse all South jurisdictions for comparison.

Contractors guide

Cross-state guidance for contractors evaluating new jurisdictions.

Regulators guide

Cross-state guidance for comparing regulatory models and agency structures.

Neighboring jurisdictions with reciprocity ties:

Texas

SPBLA plumbing reciprocity — Texas journeymen eligible for Louisiana plumbing and gas fitter licenses without exam.

Arkansas

SPBLA plumbing reciprocity — Arkansas journeymen eligible for Louisiana plumbing and gas fitter licenses without exam.

Alabama

LSLBC general contractor reciprocity with Alabama.

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Territories and DC

At a glance

Frequently asked questions

Start with your goal

Is licensure triggered?

Find the right regulator

Application and renewal details

Reciprocity direction

Special considerations

Readiness checklist

Navigation

Construction work regulated

Common determination scenarios

Who regulates construction

Requirements

Reciprocal agreements

Types of licenses

See also

South region guide

Contractors guide

Regulators guide

Texas

Arkansas

Alabama

​At a glance

​Frequently asked questions

​Start with your goal

Is licensure triggered?

Find the right regulator

Application and renewal details

Reciprocity direction

​Special considerations

​Readiness checklist

​Navigation

​Construction work regulated

​Common determination scenarios

​Who regulates construction

​Requirements

​Reciprocal agreements

​Types of licenses

​See also

South region guide

Contractors guide

Regulators guide

Texas

Arkansas

Alabama

At a glance

Frequently asked questions

Start with your goal

Special considerations

Readiness checklist

Navigation

Construction work regulated

Common determination scenarios

Who regulates construction

Requirements

Reciprocal agreements

Types of licenses

See also