Most listings are in the $20's per square foot per year. The Des Moines submarket is going through a an increase in rates. In the last 3 months, the median rate went up $23 per sqft per year.
In the last 90 days, 192 listings have come on the market, so you'll want to check back regularly for new listings. About 28% of the office spaces in the Des Moines are subleases, so you might be able to find a shorter term or below market rent. 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 5,250 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this area are close to 2 floors. Most buildings in this area were built in 1974 and are Class B.