Most listings are in the $10's per square foot per year. The Iowa City submarket is seeing a decrease in rates. In the last 3 months, the median rate decreased $4 per sqft per year. That's a 19% decline in rent.
In the last 90 days, 24 listings have been posted online, which means leases most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 4% of the available leases in the Iowa City are subleases, so you will probably have to consider a longer term 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 2,560 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this market are approximately 2 stories. Most buildings in this area were built in 1985 and are Class A.