Permits, builders and paperwork
In Bullard, check with the city's building department about permits. In Flint and other unincorporated areas, outside city limits, Texas counties generally don't issue building permits for home repairs.
If your home is still fairly new, look for any builder warranty paperwork before you call. Texas does not issue a state license for foundation repair companies, so check experience, insurance, written warranties and reviews yourself, and ask whether a licensed professional engineer (PE) designs or signs off on the repair.
Ask whether the warranty is transferable if you sell the home, whether there's a transfer fee, and what it covers.