In the last 90 days, 31 listings have been listed, which means listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 26% of the available space in the O'Fallon 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 posted, so finding a space for a small business might be tough.
Even though the median size is 40,000 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this market are around 1 stories. Most buildings in this market were built in 2001 and are Class A.