Many St. Louis MO area property owners that have experienced foundation failure in the past, say they wouldn't build a new house again without first installing new construction helical piers.
Why? They have lived through the pain of having foundation settlement problems happen to their property. They not only had to pay to fix the foundation, but also for the damage it caused when it settled.
Anytime the soil is excavated for a foundation to be poured around St. Louis, it is over-dug to allow room for the workers and equipment. Disturbing the soil can allow water to penetrate and change its ability to support weight. So any new foundation can be affected just by being built. Many times the soil isn't compacted well enough or doesn't have the support to hold the structure that is being constructed on it (the engineer's call this "blow count") .
Most commercial building projects however require the use of some type of piering prior to construction, be it a concrete pile or pier, or some form of engineered steel pier before the footings are ever poured.
There are a couple of reasons: 1) Code doesn't require it. 2) It adds costs to the project.
New construction piers aren't something you can see when you tour a potential new home. They are hard to get excited about. Having those under the ground below your feet aren't as exciting as those granite counter tops or garden tubs, and therefore not a selling point to most buyers.
Knowing what can happen to the new dream home you have waited all your life to build, you can see why educated home builders do get excited about having a stable foundation.