Contractor License Requirements by Trade

20 trade types tracked across all 50 states and DC, compiled from state licensing boards, NCSL, and NASCLA surveys (last reviewed January 2026). Click any trade to compare state-by-state requirements. See our methodology.

Universally Licensed Trades

45+ states require license

These trades require licensing in nearly all states due to safety regulations and code enforcement.

⚡
Most states

Electrician

Installs and maintains electrical wiring, equipment, and fixtures

51 of 51 states require license 100%
🪲
Most states

Pest Control

Eliminates and prevents infestations of insects, rodents, and other pests using chemicals

51 of 51 states require license 100%
🔧
Most states

Plumber

Installs and repairs water, gas, and drainage systems

47 of 51 states require license 92%

Commonly Licensed Trades

30–44 states

Required in most states, though a handful have more permissive local rules.

🪚
Many states

Carpenter

Builds and repairs structures, fixtures, and furniture using wood and other materials

36 of 51 states require license 71%
⛏️
Many states

Demolition

Safely tears down or removes structures, buildings, or hazardous materials

36 of 51 states require license 71%
🛗
Many states

Elevator Mechanic

Installs, maintains, and repairs elevators, escalators, and lifts

36 of 51 states require license 71%
🚜
Many states

Excavation

Performs earthmoving, grading, trenching, and site preparation work

36 of 51 states require license 71%
🔥
Many states

Fire Protection

Installs sprinkler systems, fire alarms, and suppression equipment

32 of 51 states require license 63%
🪵
Many states

Flooring Installer

Installs hardwood, carpet, tile, vinyl, and other floor coverings

36 of 51 states require license 71%
🏗️
Many states

General Contractor

Oversees all aspects of construction projects, coordinates subcontractors

36 of 51 states require license 71%
🪟
Many states

Glazier

Installs glass in windows, storefronts, curtain walls, and other structures

36 of 51 states require license 71%
❄️
Many states

HVAC Technician

Installs and services heating, ventilation, air conditioning, and refrigeration systems

40 of 51 states require license 78%
🏠
Many states

Insulation Installer

Installs thermal and acoustic insulation in walls, ceilings, and floors

36 of 51 states require license 71%
🌿
Many states

Landscaper

Designs, installs, and maintains outdoor spaces, gardens, and lawns

36 of 51 states require license 71%
🧱
Many states

Mason

Constructs structures from brick, concrete, stone, and similar materials

36 of 51 states require license 71%
🖌️
Many states

Painter

Applies paint, stain, and other finishes to interior and exterior surfaces

36 of 51 states require license 71%
🔲
Many states

Tile Setter

Sets tile in floors, walls, and countertops for residential and commercial projects

36 of 51 states require license 71%

Selectively Licensed Trades

Under 30 states

Licensed in fewer states — always check your specific state's requirements.

🏊
Some states

Pool Contractor

Builds, repairs, and maintains swimming pools and spas

25 of 51 states require license 49%
🏠
Some states

Roofer

Installs and repairs roofs using shingles, metal, or other materials

28 of 51 states require license 55%
☀️
Some states

Solar Installer

Installs photovoltaic systems, solar panels, and related electrical equipment

25 of 51 states require license 49%

Note: "License required" indicates a state-level license is needed. Even where no state license exists, local permits and registrations may be required. Always verify with your local building department.