Methodology & Data Sources

Data Sources

  • State licensing board websites: The primary and most official source for contractor license types, exam requirements, surety bond amounts, insurance minimums, and continuing education requirements. Each state's licensing board or department of professional regulation publishes official requirements on their government website (e.g. California CSLB, Texas TDLR, Florida DBPR). Some states have a single unified contractor licensing board, while others regulate individual trades through separate boards for electrical, plumbing, and HVAC work.
  • National Conference of State Legislatures (NCSL): NCSL is a nonpartisan organization that tracks contractor licensing legislation across all 50 states and publishes state-by-state summaries of licensing requirements, recent legislative changes, and emerging trends in occupational licensing reform.
  • National Association of State Contractors Licensing Agencies (NASCLA): NASCLA is the professional association for state contractor licensing agencies. It publishes annual state-by-state surveys of contractor licensing requirements and administers the NASCLA Accredited Commercial Contractor Examination, which is accepted for initial licensing in participating states.
  • US Department of Labor: Federal occupational licensing context and labor-condition guidance via the DOL Employment & Training Administration professional licensing portal and BLS Occupational Outlook Handbook for cross-state comparability.

Coverage

PlainHireCheck covers 20 trade categories across all 50 states and Washington D.C., producing over 1,000 unique state-trade licensing requirement records. Trade categories include general contractor, electrical, plumbing, HVAC, roofing, framing, concrete, masonry, painting, flooring, landscaping, pool, solar installation, fire protection, and others. For each state-trade combination, PlainHireCheck documents whether a state-level license is required, what type of license is needed, which exams must be passed, and what financial requirements (bonds and insurance) apply.

The Strictness Score

Each state's 0-10 "Strictness Score" (shown on state pages and the strictness ranking) is a qualitative composite assembled by our editorial process from four documented dimensions: the number of distinct license classifications the state's board maintains, whether a mandatory licensing exam is required, the minimum dollar threshold at which a license becomes mandatory, and the size of required bonds or insurance. It is not a single weighted formula applied mechanically, it reflects our editorial judgment of how these dimensions combine into an overall regulatory burden, and the specific rationale for each state's score is shown on that state's page. Treat it as a relative, comparative signal, not a precise measurement, the underlying trade-license counts (the "X of 20 trades licensed" figures) are the directly-sourced facts; the strictness score is our interpretation of them.

Processing Pipeline

  1. Compile a state-and-trade reference snapshot from state-board material, NCSL, NASCLA, and the links recorded in the dataset
  2. Record the published license type, issuing authority, and whether the snapshot identifies a statewide requirement (some states defer to county or municipal licensing)
  3. Record available exam, bond, insurance, continuing-education, and official lookup fields without treating a missing field as a current zero
  4. Preserve the official verification link where the snapshot contains one
  5. Date the compilation snapshot; the shared January 2026 row date is not a separate verification date for each jurisdiction

Data Currency

Licensing requirements change when state legislatures pass new bills or licensing boards revise their rules. This dataset was compiled as a single snapshot in January 2026, and every state row carries that same compilation date, and it is not a per-state verification date, and we do not claim to have re-checked each of the 51 jurisdictions since. Licensing requirements change whenever a legislature passes a bill or a board revises its rules, so for anything you are relying on, follow the state's own board link on its page and confirm there.

Accuracy Commitment

PlainHireCheck compiles state-and-trade determinations from the source material recorded in its dataset. A statewide requirement in this snapshot does not settle municipal or county rules, and an absent board link is not evidence that no official source exists. Where a board or verification link is published on a page, use it to independently verify the current requirement. All rows share a compilation date rather than separate current-review dates.

Bond, insurance, fee, exam, and continuing-education fields are descriptive fields from the published snapshot, not legal determinations or a guarantee that a value remains current. Always confirm the exact current figure and local applicability with the state licensing board before relying on a specific number.

Limitations

  • Some trades are licensed at the county or municipal level rather than statewide, those trades may show "no state license required" even though a local permit, business license, or trade-specific registration is needed from the local jurisdiction.
  • Licensing requirements change when state legislatures pass new bills or licensing boards revise their administrative rules. Always verify current requirements directly with the relevant state licensing board before hiring a contractor or applying for a license.
  • Bond and insurance figures are descriptive snapshot fields, not typical or recommended coverage. A project, insurer, locality, or agency may require a different amount.
  • Reciprocity and interstate license recognition varies by state and trade. NASCLA maintains information on states that participate in the Interstate Compact for commercial general contractor licensing.
  • This site does not constitute legal advice. PlainHireCheck is not affiliated with any state licensing board, NCSL, NASCLA, or any government agency.

Corrections

If a record on this site looks wrong, report it with the page URL and the value you believe is incorrect. We compare the report against the published source and, when the value is wrong on our side, fix it in the underlying database so every affected page updates at once, not just the one page you flagged. We aim to acknowledge reports within a few business days. Our full editorial & corrections policy covers the complete process.

Reuse and citation

Every state, trade, and rankings page carries a "Cite this page" block with a ready-to-use citation string, plus structured Dataset markup identifying it as a distinct, citable data source. You're free to cite or quote any figure with attribution to PlainHireCheck, link back to the specific page you drew it from so the citation stays current as our data refreshes. A bulk CSV extract of the state licensing statistics is free to download at /data/contractor-licensing-statistics.csv (same CSV as the homepage Dataset, CC BY 4.0). If you need an API or a larger custom extract, get in touch.

Contact

Questions or data corrections? Contact us.