On average, listings lease in the $20's per square foot per year. The St. Louis region is seeing a decline in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 9% decrease in rent.
Compared to the rest of the St. Louis market, the St. Louis submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 117 listings have been posted online, so you'll want to check back regularly for new listings. About 3% of the office spaces in the St. Louis are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,500 sqft. Most properties in this market are approximately 3 stories. Most buildings in this region were built in 1963 and are Class B.