Data sources and coverage
Everything here comes from files that state and city agencies publish. Each record carries the date we read it.
License files
| Source | Records | Read | Note |
|---|
| Texas TDLR: electricians and A/C | 464,437 | Nov 15, 2026 | |
|---|
| Washington L&I: contractors with insurance | 121,714 | Nov 15, 2026 | |
|---|
| Oregon CCB: active contractors with insurance and bond | 56,688 | Nov 15, 2026 | |
|---|
| Texas plumbing board: master and tradesman plumbers | 17,385 | Nov 15, 2026 | |
|---|
Permit files, last two years
What this does not cover
- States and cities not listed above. A missing license here is not proof there is none.
- Florida and California license the contracting business; individual journeymen are certified elsewhere.
- Insurance is shown only where the agency publishes it: California workers' comp, Washington, Oregon and Texas master plumbers.
- New York City publishes a license status but no expiry date.