Direct Answer
To hire a reliable water main & underground utility work contractor in San Antonio: (1) Get 3 written quotes with line-item breakdowns, (2) Verify TX license at Texas Department of Licensing and Regulation (tdlr.texas.gov), (3) Confirm active general liability and workers' comp insurance, (4) Check Google and BBB reviews specific to San Antonio projects, (5) Never pay more than 10-30% upfront — never pay in full before completion.
Full Explanation
Red flags specific to San Antonio contractors: no physical San Antonio-area address, pressure to start immediately, cash-only payment demands, and license numbers that don't verify at Texas Department of Licensing and Regulation (tdlr.texas.gov). Seasonal demand during summer brings out less reputable contractors.
Local Factors in San Antonio
📍Verify license: Texas Department of Licensing and Regulation (tdlr.texas.gov)
📍File complaints: Texas Department of Licensing and Regulation (tdlr.texas.gov)
📍Homeowner protections under TX consumer protection law
📍BBB Greater San Antonio chapter for complaints history