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A RocketLevel guide for restoration owners, backed by decades of experience in the trade. About a 9-minute read.
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Reviewed October 2026. Licensing laws change, and they vary by state, so use this page to know what to ask, then confirm with each state's contractor board or a construction attorney before you rely on it.
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A single-state shop only has to learn one set of rules. The moment you take a catastrophe (CAT) deployment two states over, or open a branch, or follow a national property manager into a new market, you inherit a second set, and often a third. Restoration licensing is not federalized. Each state contractor board writes its own thresholds, its own categories, and its own reciprocity rules, and the categories that matter to restoration (contractor, mold, asbestos, lead) sit in different agencies that do not talk to each other. This page is the operator's method for getting in front of that before a compliance gap voids a contract, a claim, or your spot on an approved-vendor list.
Think in categories rather than memorizing names, because the names differ by state and change. Five categories cover almost everything restoration runs into.
Contractor license, general or specialty. Whether a dollar threshold or a reconstruction scope pulls your work under a license is set state by state, so both answers come from that state's contractor board rather than from a rule of thumb. The mitigation side of a job may need nothing; the rebuild that follows often crosses the line. Some states issue a broad general-contractor license; others carve out specialty classifications you have to match to the work. The threshold and the classification are the two things to confirm, because a job that was exempt at $5,000 of drywall is not exempt at a full commercial rebuild.
Mold assessment and remediation. A subset of states license mold work separately, and at least four of them require that the firm assessing the mold not be the same firm that remediates it, to remove the conflict of interest: Texas (Occ. Code 1958.155), Florida (Fla. Stat. 468.8419(1)(d) and (2)(d), which carves out Division I contractors, meaning general, building and residential contractors under Fla. Stat. 489.105(3)), New York (Labor Law 936(2) and (3)), and Louisiana (R.S. 37:2158(A)(23)(c) and (d)). Where these licenses exist, doing mold work without them is a direct compliance problem. Where they do not exist, the work may fall under general contractor rules or under nothing specific at all. Those four are not identical, and they are the ones we read against their own text, not a verified count of all fifty. The variation here is wide, so mold is the category most worth checking state by state.
Asbestos abatement. The federal framework sets a floor and each state decides what it layers on top, which can include a firm license and a separate worker certification. Put that question to the state's asbestos program before you bid, because the answer is theirs to give. Older and commercial buildings raise the odds you encounter it, and the penalty for handling it without the credential is steep.
Lead (federal floor, state overlay). Renovation that disturbs paint in pre-1978 housing and child-occupied facilities falls under the EPA Renovation, Repair and Painting (RRP) rule, which requires a certified firm and certified renovators. Some states are authorized by the EPA to run their own RRP programs, which means the rule is administered by a state agency with its own card and renewal, rather than by the EPA directly. So lead is federal at the floor but can be a state credential in practice. Confirm which applies in each state you enter.
Registration versus licensing. These are not the same thing and the distinction trips people up. A license says a regulator has vetted you to perform a trade. Registration is often just putting your business on a list (foreign-entity registration with the secretary of state, a local business license, a home-improvement registration in states that register rather than license residential work). A state that does not license your trade may still require you to register before you legally operate or bill there, so look up yours. Both can be enforced, and both can show up on a commercial decision maker's checklist.
An unlicensed job can cost a lot more than a fine and an awkward conversation. The exposure can be the whole contract price. Whether an unlicensed contractor can sue to collect is set by each state's licensing law, so look up yours. Where it cannot, a client who simply declines to pay has a complete defense and you have no mechanism to force the invoice.
California runs the hardest version. Under Business and Professions Code 7031(a), a contractor who was not duly licensed at all times during performance cannot bring or maintain any action to collect compensation for work that required a license. Subsection (b) goes further: the person who hired you can sue to recover all compensation already paid. That applies even where the work was performed competently, and the substantial-compliance exception at 7031(e) is not available at all to a contractor who was never licensed for the work.
Weigh that at the bid. An out-of-state rebuild taken without the right classification can end with you paying your crew, paying your subs, buying the materials, finishing the work, and then handing the entire contract price back. Confirm the credential before you mobilize.
It helps to understand why this is a patchwork, so the variation stops feeling random. Contractor regulation in the United States is a state police power, not a federal one, so each state legislature and board sets its own bar based on local history, consumer-protection priorities, and trade lobbying. That is why one state licenses anyone doing more than a few thousand dollars of work and a neighboring state only licenses specific trades.