Perma Jack of St. Louis has been helping residential and commercial property owners since 1974. We have the longest experience of any company in the U.S. using hydraulically driven steel piers for supporting settling residential and commercial foundations – a system first developed and then patented nearly 50 years ago by Perma Jack. Since then, our hydraulically driven steel piers, or "push piers", have been used to repair foundation settlement across the United States.