The Handbook of Texas describes Lubbock County's soils as loams and sandy loams over a clay subsoil, with a caliche hardpan two to three feet down. That clay swells when a storm soaks it and shrinks through dry, windy stretches, and the cycle moves both kinds of foundation in different ways.
It is common to find pier-and-beam foundations under the pre-war houses in Overton, Tech Terrace, and Heart of Lubbock. Those homes sit on piers over a crawl space, so leveling usually means shimming or replacing supports, sistering tired joists, and fixing crawl space drainage. From the post-war building boom on, most Lubbock homes were poured slab-on-grade, and new construction is overwhelmingly slab. Slab movement shows up as stair-step cracks in brick, diagonal drywall cracks at door corners, and doors that stop latching, and the durable repair is piers driven to stable soil.
Either repair leaves cracked drywall, sticking doors, and gapped trim behind it. We start with a free foundation inspection, do the leveling, then handle the drywall, door, trim, and paint work, so you are not hiring a second contractor to finish the job.