On average, listings lease in the $20's per square foot per year. The Maryland Heights submarket is going through a a boost in rates. In the last 3 months, the median rate went up $25 per sqft per year.
In the last 90 days, 40 listings have been made available, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 110% of the available space in the Maryland Heights 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 posted, so finding a space for a small business might be tough.
Even though the median size is 3,210 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this region are close to 2 floors. Most buildings in this region were built in 1982 and are Class B.