Verifying licenses for a directory means holding the whole state licensing file, not one record at a time. That makes questions answerable that nobody usually asks. We publish what we find here — free to cite with attribution, no email required.
894 of 8,650 active Responsible Master Plumber licenses in Texas (10.3%) carry an insurance certificate that has already expired in the state board's own file, and 8 of those expired over a year ago. Includes a lapse-rate breakdown for the 15 largest counties.
Updated August 13, 2026 · Source: TSBPE licensee file
Every active and expired Responsible Master Plumber license published by the Texas State Board of Plumbing Examiners, TDLR mold remediation licensees, and IICRC Certified Firm records — each with an append-only history, so we can see status changes over time rather than only today's snapshot. That history is what makes trend analysis possible, and it is why we keep re-verification stamps visible on every listing.
Cite freely with attribution to Homversa and a link to the study page. Numbers recompute when we re-ingest the source files, so quote the "as of" date shown on each study. For a custom cut of the data — a specific county, city, or time range — write to [email protected]. How we verify and rank.