Licensed Well and Septic Contractors: Williamson County, TX

110 licensed well and septic pros based in Williamson County. Every license number below is sourced from public licensing records, with a link to look it up yourself.

Grouped by the county of the address on each license record, which can be a mailing address, so it doesn't tell you where the business works. When the record names no county, we place it by ZIP code, then town.

Checked against Texas Commission on Environmental Quality (TCEQ) - OSSF occupational licensing and Texas Department of Licensing and Regulation (TDLR). Roster copy last refreshed 2026-08-17.

Towns in Williamson County

All 4 towns named on the license records based here, with the number of listings in each, most first.

License classes on the Williamson County records

Each class as the issuing agency prints it on the license record. A record that names more than one class counts once under each, so the rows can add up to more than 110.

Septic Contractors based in Williamson County (101)

Water Well Contractors based in Williamson County (9)

Own one of these businesses? Find your listing and claim it.

Looking for a specific contractor? Search by name, business name, or license number.

Services in Williamson County, with national cost ranges

Listings based in Williamson County whose license class covers each service. Cost ranges are national; each links its cost guide.

None of the listings based in Williamson County hold a license class we can match to septic tank pumping, septic inspection or septic system design. Ask any contractor whether they do this work, or try a nearby city.

Hiring a well and septic professional in Williamson County

Before you sign anything: confirm the license on this page is still active with the agency that issued it, ask for proof of insurance, and get at least three written quotes; pricing on this work varies widely by site conditions.

Do I need a permit for well or septic work in Texas?

Neighboring counties