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.

Processing Pipeline

  1. Research each state licensing board's official website for each of the 20 trade categories
  2. Document the license type required, the issuing authority (state board name), and whether a state license is required at all (some states defer to county/municipal licensing)
  3. Record exam requirements: whether a trade exam, business/law exam, or both are required
  4. Document bond minimums (surety bond amounts) and insurance minimums (general liability and workers' compensation) where specified
  5. Record continuing education (CE) requirements for license renewal
  6. Extract direct links to each state's official license verification lookup tool
  7. Date-stamp each record; data was last systematically reviewed in January 2026

Data Currency

Licensing requirements change when state legislatures pass new bills or licensing boards revise their rules. The data on PlainHireCheck was last systematically updated in January 2026. We review and update records when significant legislative changes are identified.

Accuracy Commitment

PlainHireCheck reproduces licensing requirements exactly as published by state licensing boards, NCSL, and NASCLA. License types, exam requirements, bond amounts, and insurance minimums are presented as documented by the official sources. When a state has no statewide licensing requirement for a particular trade, this is clearly stated rather than omitted. Direct links to each state's official license verification tool are provided to enable independent verification. All records include the date of last systematic review.

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 minimums shown are statutory minimums only. Specific projects, particularly commercial or government contracts, may require significantly higher coverage levels.
  • 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.

Contact

Questions or data corrections? Contact us.