Most listings are in the $20's per square foot per year. The Lake St. Louis submarket is going through a a rise in rates. In the last 3 months, the median rate rose $3 per sqft per year. That's a 12% rise in rent.
In the last 90 days, 2 listings have come on the market, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 22,000 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this market are close to 3 floors. Most buildings in this market were built in 2000 and are Class B.