Helical pile company in Caseyville, Illinois: HELITECH, plus notes on sinkhole plain soils near St. Louis, frost depth, permits and cost.
Caseyville is in the Metro East area across the river from St. Louis, not far from the sinkhole plain the Illinois State Geological Survey has mapped. It counted more than 10,000 cover-collapse sinkholes in Monroe County alone. For properties in southwestern counties, that mapping is a helpful reference before foundation design begins.
Helical piles can reach competent soil with compact equipment and give a measurable capacity check at each location, and they can go in during winter when frozen ground would delay footings. Central and southern Illinois communities generally use shallower frost depths than Chicago, but each municipality or county sets its own.
One company is based in Caseyville.
HomeGuide reports typical installed prices of roughly $2,000 to $4,000 per pier nationwide. In Illinois, deep frost requirements, urban access, and soft soils can all affect price. Read our helical pier cost guide for what a quote should include.
Questions to put to any installer:
For the wider picture, see our page on Illinois helical pile installers.