Check the plumber's Texas licence
Plumbing in Texas is licensed by the Texas State Board of Plumbing Examiners (TSBPE). Ask the company for its Responsible Master Plumber's name and licence number (Master Plumber numbers start with “M”), then check the licence and the certificate of insurance on the TSBPE website. Ask your city's plumbing inspection office whether the job needs a permit.
Source: Texas State Board of Plumbing Examiners: consumer information, checked 26 Oct 2026