On average, listings lease in the $20's per square foot per year. The St. Louis County submarket is going through a an increase in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 12% rise in rent.
In the last 90 days, 106 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 County are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 4,360 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this region are around 3 stories. Most buildings in this region were built in 1961 and are Class B.