On average, listings lease in the $20's per square foot per year. The St. Louis region is going through a a rise in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 3% rise in rent.
Compared to the rest of the St. Louis market, the St. Louis region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 106 listings have been made available, so you'll want to check back regularly for new listings. About 74% of the office spaces in the St. Louis are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 10,000 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this area were built in 1961 and are Class A.