On average, listings lease in the $20's per square foot per year. The Missouri submarket is going through a a rise in rates. In the last 3 months, the median rate increased $23 per sqft per year.
In the last 90 days, 1855 listings have come on the market, so you'll want to check back regularly for new listings. About 55% of the listings in the Missouri are subleases, so you might be able to find a shorter term or below market rent. 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 2,900 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this market are around 2 floors. Most buildings in this area were built in 1982 and are Class B.