The City of Laredo issues building permits, and the hired contractor usually pulls them. Whether a given floor needs one depends on the project, so I sort that out when I see the job, and when it does, we pull it with the city. Contractors working in Laredo also have to be registered with the city, which is worth asking anyone you're weighing.
About a third of Webb County's soil is high shrink-swell clay. It swells when it's wet and shrinks as it dries, and left unmanaged, that movement can crack slabs. Soil changes from lot to lot, so I look at your ground before I price the base, and it's the reason we clear and pack it the way we do.
We're based in Laredo and do concrete work across Laredo and the cities around it. Floor calls here come from homeowners and small business owners alike, for shops, storage rooms, additions and work spaces. Where there's an old slab, it's usually cracked or sitting uneven because the ground under it moved.