“Do I need a license for this job?” depends on your state, your trade, your city and the size of the job. A fifty-state table goes stale fast: California doubled its threshold on January 1, 2025. What does not go stale is the method. Set a timer for 15 minutes.
Minutes 0 to 3: describe the job the way a board will
The state rules below all turn on the same handful of questions. Write your answers down before you open a single website:
Minutes 3 to 7: find the state board and its rule
Search for your state’s name and “contractor license board,” and use only the government site, not a license-help service. Look for a page about who needs a license. Here is what three states say:
While you are on the board’s site, note what it takes to get the license if you need one. In California, for example, the person who qualifies the license needs at least four full years of journey-level experience, or experience as a foreman, supervisor or contractor, in the classification within the last ten years.
Minutes 7 to 9: look for a separate trade board
The main contractor license does not always cover every trade. Florida is the clear example: its Electrical Contractors’ Licensing Board “is responsible for licensing and regulating electrical contractors,” and its categories include alarm system contractors, apart from the construction board’s licenses. If your work touches wiring, alarms, gas, plumbing or refrigerant, check your state for a separate license or certification before you assume the main one covers it.
Minutes 9 to 12: check the county and the city
The state is only part of it. The SBA’s licensing guide lists construction and plumbing among the business activities “commonly regulated at the local level” and tells owners to research their own state, county and city rules. Check the county and city where your business is based for a business license or contractor registration, and check the permit office in each place you expect to pull permits. In Florida, a registered contractor’s license itself is tied to the local jurisdictions where it was issued.
Minutes 12 to 15: read the exemption the way the board will
Where a state exempts small jobs, the exemption is where contractors get tripped up. Read every condition, not just the dollar figure. The same three states:
| Condition | California (B&P Code §7048) | Florida (§489.103(9)) | Arizona (§32-1121(A)(14)) |
|---|---|---|---|
| Dollar limit | Under $1,000 (it was $500 before 2025) | Under $2,500 | Under $1,000 |
| What it counts | The aggregate contract price for labor, materials and all other items, on one or more contracts on the project | The aggregate contract price for labor, materials and all other items | The aggregate contract price, including labor, materials and all other items |
| Kind of work | Work under the limit is “considered of casual, minor, or inconsequential nature” | “Casual, minor, or inconsequential” | “Casual or minor”; never fire-safety installation or repair, or connecting anything to a gas or other fuel supply (§32-1121(D)) |
| Permit | No exemption if the work requires a building permit (the CSLB says a permit “of any kind”) | Not one of the two conditions in this paragraph | No exemption if the work requires a local building permit |
| Helpers | No exemption if you employ anyone to do or help with the work | Not one of the two conditions in this paragraph | Not one of the conditions in this paragraph |
| Splitting the job | No exemption if part of a larger operation, or split into contracts under $1,000 | No exemption if part of a larger operation, or split into contracts under $2,500 | No exemption if part of a larger operation, or split into contracts under $1,000 |
| Advertising | May advertise work under $1,000 only by stating you are not licensed (§7027.2) | No exemption for anyone who advertises as a contractor or as qualified to contract | Every advertisement must say “not a licensed contractor” |
Four lessons come out of those three states. The limit counts labor and materials together. It covers the whole project, so splitting one job into small invoices does not get under it. A permit can end the exemption whatever the price, and in California so can hiring a helper. And the way you advertise can cost you the exemption on its own. One more: Florida’s exemption sits in the construction-contracting part of its law, and electrical and alarm work answer to the separate electrical board, so check that board’s rules before you lean on the $2,500 figure.
What guessing wrong costs
California’s board spells it out. An unlicensed person who bids over $1,000, does work that requires a permit or employs workers “is subject to legal action,” and the penalties include administrative fines of up to $15,000, jail sentences of up to six months and fines up to $5,000. Repeat offenders may face a mandatory 90-day jail sentence and a fine of $5,000 or 20 percent of the contract price, whichever is greater. Other states set their own penalties, so read your own board’s.
Write down what you found
Spend the last minute on a one-page license file:
- The state board, the license or registration you need, and its classification.
- Any separate trade license (electrical, plumbing, gas, alarm).
- Every county and city registration or business license.
- The numbers once you have them, and each renewal date.
- The date you checked, and the links you checked.
That last line matters because the rules move. California’s minor-work limit went from $500 to $1,000 on January 1, 2025. Check again every year at renewal, and any time you add a trade or start working in a new county.
When the license question is settled, the rest is getting the work. Our trade pages walk through the questions that move the price in each trade.
General information, not legal or tax advice. Rules change and vary by state; check with the agency named above or a professional for your situation.