Most listings are in the $20's per square foot per year. The O'Fallon region is experiencing a a rise in rates. In the last 3 months, the median rate rose $4 per sqft per year. That's a 18% increase in rent.
In the last 90 days, 4 listings have been listed, which means leases might be leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 2,830 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this region are approximately 1 floors. Most buildings in this area were built in 2001 and are Class B.