Most listings are in the $20's per square foot per year. The St. Louis County region 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 11% rise in rent.
In the last 90 days, 72 listings have come on the market, so you'll want to check back regularly for new listings. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 5,060 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this area are close to 3 floors. Most buildings in this region were built in 1950 and are Class A.