Contractor License Requirements by State: How to Check

Whether a license is needed is the question we hear most from tradespeople who are about to go out on their own. The honest answer is that it depends on three things: where the work is, what trade it is, and often how big the job is. This guide shows how to find the rule that applies to you and what a licensing board usually asks for. It uses California, Florida and Texas as labeled examples, not as rules for everyone.

Is there a national contractor license?

No. Construction licensing in the U.S. is a state and local matter. The U.S. Small Business Administration says license and permit requirements vary by business structure as well as by state, county and municipality, and it points business owners to state and local government offices to check.

The National Association of State Contractors Licensing Agencies (NASCLA), a membership group of state licensing agencies, publishes state licensing information and runs a commercial contractor exam used by participating state agencies. It is a useful starting point, but your state board’s own website is the source to rely on.

Which agency licenses your trade?

States organize licensing in very different ways. Some have one board for all construction trades; others split licensing across several agencies; some license only certain trades statewide and leave general building to cities and counties. Three examples, each labeled:

• California: the Contractors State License Board (CSLB) licenses general and specialty contractors in dozens of classifications, from general building (B) to electrical (C-10) and plumbing (C-36). See our California CSLB guide.
• Florida: the Construction Industry Licensing Board, within the Department of Business and Professional Regulation, licenses contractors. A certified contractor (occupation codes starting with “C”) may contract anywhere in the state; a registered contractor (codes starting with “R”) may contract only in the local jurisdictions where they met the competency requirements.
• Texas: the Texas Department of Licensing and Regulation (TDLR) says anyone who performs or offers to perform non-exempt electrical work in Texas must be licensed and work through a licensed electrical contractor, and air conditioning, refrigeration and heating contractors need a TDLR license. Plumbers are licensed by a separate agency, the Texas State Board of Plumbing Examiners.

Not verified: we have not checked every state. If your state isn’t listed here, search your state’s official site (ending in .gov) for “contractor license” plus your trade, and check your city and county building or permit office as well.

Is there a dollar amount below which you don’t need a license?

Many states set a minimum job size. California: CSLB says a license is needed for construction projects priced at $1,000 or more in labor and materials combined. CSLB also says you can’t break a project into smaller pieces or charge by the hour to get around the limit, and the small-job exemption doesn’t apply to work that requires a building permit or if you employ anyone.

Other states use different amounts or none at all, and some trades (electrical, plumbing, HVAC) are licensed regardless of job size. Read the exact rule on your board’s site rather than relying on a number you heard on a jobsite.

What do licensing boards usually ask for?

The details differ, but most applications include several of these:

• Experience. Proof of time working in the trade, often signed by a former employer or supervisor. California: four years of journey-level experience within the last 10 years, with education able to replace up to three years.
• Exams. Commonly a business and law exam plus a trade exam. California: CSLB requires both, except that the C-61 limited specialty classification has no trade exam.
• A qualifier. Some states license the business and require a qualifying individual who holds the experience.
• A bond. A license bond protects consumers and workers. California: a $25,000 contractor bond for all licensees.
• Insurance. Proof of workers’ comp (or an exemption) and, in some states or for some entity types, liability insurance. See our workers’ comp guide.
• Background check and fees. Fingerprints are required in some states; application and license fees vary.

Do cities and counties add their own rules?

Often. Even where the state licenses your trade, a city may require a business license or tax certificate, and the building department issues permits for specific jobs. In states without a statewide license for general building, the city or county may run its own contractor registration. Call or check the building department in each city where you plan to work.

Can you work in more than one state?

Usually you need a license in each state that requires one. Some states have reciprocity agreements or accept another state’s exam results. California: CSLB has reciprocity applications and publishes equivalency determinations for similar Arizona, Louisiana and Nevada classifications. NASCLA lists the state agencies that participate in its commercial exam. Check each state board before you bid across a state line.

What happens if you work without a required license?

It depends on the state. California: CSLB’s applicant workshop lists thousands of dollars in civil penalties and possible criminal charges for unlicensed work, and points out that a license gives you legal options if customers don’t pay. Unlicensed work can also create problems with permits, insurance and getting paid in other states. Get the license before you advertise or bid.

What should you do next?

Once you know the licensing path, set up the business itself: compare an LLC and a sole proprietorship, get your free EIN from the IRS, and work through the full start-a-contractor-business checklist.