Contractor license requirements by state: a guide

Why "do I need a license?" has no single answer

Owners starting a home service business, or expanding into a new state, usually ask one question: what license do I need? The honest answer is that it depends on three things: the trade, the state and the city or county. A residential cleaning company may need only a business registration and a local business license. An electrical contractor needs individual licenses for its electricians and, in most places, a contractor or business license as well. An HVAC company may need a state license in one place, a city license in another and federal refrigerant certification everywhere.

This guide explains how the layers fit together, where to check, and how reciprocity works. It is general guidance; licensing boards change rules often, so confirm details with the board before you rely on them.

The four layers of licensing

Each layer is independent. A state license does not replace a city permit, and a city business license does not authorize trade work. Federal certifications apply on top of everything else: technicians who maintain, service, repair or dispose of equipment that could release ozone-depleting refrigerants must be certified under Clean Air Act Section 608^[6], and firms paid to disturb painted surfaces in pre-1978 homes, childcare facilities and preschools must be certified under EPA's lead renovation rule^[7].

How the major trades differ

The trade you are in shapes the licensing picture more than anything else:

• Electrical: most states require electricians to be licensed^[1], usually with apprentice, journeyman and master levels and a contractor license for the business.
• HVAC: some states and localities require HVAC technicians to be licensed^[2]; others license only the contractor or leave it to cities. Federal EPA 608 certification applies everywhere.
• Pest control and lawn treatment: state law requires pest control workers to be licensed, usually after training and an exam^[8]. The business also needs a license in most states.
• Roofing: licensing ranges from a statewide contractor license to local registration only, depending on the state.
• Handyman: often no specific license, but strict limits on the size and type of work allowed without one.
• Garage doors and appliance repair: frequently covered by general contractor or specialty rules, local permits, or service-dealer registration rather than a dedicated license.
• Cleaning: usually business registration, a local business license and sometimes a bond, rather than a trade license.

Statewide versus local licenses

Some states issue licenses that work everywhere in the state; others leave competency testing to cities and counties. Florida shows both models side by side. Its statute defines a certified contractor as one holding a state certificate of competency who may contract anywhere in Florida, and a registered contractor as one who registered after meeting the competency requirements of a local jurisdiction and may contract only in that jurisdiction^[3].

That distinction matters when you grow. A company with a local registration that wins a job in the next county may need a second registration or a state certification first. Check how your state works before you bid outside your home area.

Minor-work and handyman exemptions

Many states let people do small jobs without a contractor license, but the exemptions are narrow and easy to break:

• California raised its minor work exemption from $500 to $1,000 effective January 1, 2025; the exemption does not cover work that needs a building permit, and it does not apply to someone who hires workers or advertises as a contractor^[4].
• Arizona exempts work where the total contract price, including labor and materials, is less than $1,000, but not when the work needs a local building permit, is part of a larger operation, or is advertised without stating "not a licensed contractor"; work on gas connections and fire safety is excluded^[5].

Splitting a larger job into small invoices to stay under a limit is treated as a violation in many states. When in doubt, assume you need the license.

Reciprocity: using a license in another state

Reciprocity agreements let a licensee in one state get a license in another without repeating every exam. They are usually trade-specific and limited: an electrical agreement between two states may cover journeyman licenses but not master licenses, or require a minimum number of years licensed. Some states accept a national standardized exam score for part of the requirement but still require their own business and law exam.

1. 01

   Check the target state's board

   Look for a reciprocity or endorsement page for your trade and license level.

2. 02

   Confirm your record

   Most boards require a license in good standing, verified directly by your home board, and proof of experience.

3. 03

   Expect a state exam

   Business and law exams are rarely waived because they cover state-specific rules on contracts, liens and consumer protection.

4. 04

   Register the business

   Register the company with the secretary of state, get insurance that covers the new state and post any required bond.

5. 05

   Add local layers

   Check city and county registration and permit rules for the areas you will serve.

Where to check, and how to keep records

Start with the state contractor licensing board or the agency for your trade (often a department of licensing, labor, agriculture for pest control, or a state fire marshal for some gas and fire work). Then check the building department of each city and county you serve. Write down what you found, the date and the name of the person you spoke with if you called.

Most firms that need licenses are small: 58.3% of plumbing and HVAC contractor establishments^[9], 58.6% of electrical contractors^[10] and 65.3% of roofing contractors^[11] had fewer than five employees in 2023, so the owner usually holds the qualifying license personally.

If that one license holder leaves, retires or lets the license lapse, the company can lose the right to work. Plan for a second qualified person as you grow. Track every license, certification, bond and insurance policy with its renewal date and continuing education needs in one place, and set reminders well ahead of each deadline.

Example: an HVAC company expands across a state line

Example. A fictional HVAC company licensed in one state wins a service contract for a property manager with buildings across the border. Before scheduling work, the office manager checks the neighboring state's board and finds it licenses HVAC contractors at state level, requires a qualifying individual with a state license, and offers no reciprocity for the company's current license. The owner books the state business and law exam and the trade exam, the company registers with the secretary of state, and its insurer adds the new state. Each city on the contract also requires a local registration. Work starts eight weeks later, fully licensed, instead of with a stop-work order on day one.

What working unlicensed can cost

The penalties for unlicensed contracting vary by state, but they tend to stack up in the same ways:

• Fines and stop-work orders from the licensing board or building department.
• Contracts you cannot enforce: in many states an unlicensed contractor cannot sue for payment or file a mechanic's lien.
• Refunds: some states let customers recover what they paid to an unlicensed contractor, even for finished work.
• Insurance gaps: general liability and workers' comp claims can be disputed when the work required a license you did not hold.
• Permit problems for the homeowner, which turn into callbacks, bad reviews and lost referrals.
• Criminal charges in some states for repeat or storm-related violations.

Compared with those costs, the exam fees and study time for the right license are small.

What to read next

Our trade-specific guides go deeper: HVAC license requirements, electrical license levels, roofing licenses and pest control licensing.