Most listings are in the $10's per square foot per year. The Iowa region is experiencing a decline in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 8% decrease in rent.
In the last 90 days, 558 listings have been posted online, so you'll want to check back regularly for new listings. About 2% of the available leases in the Iowa 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 on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,480 sqft. Most properties in this market are close to 2 stories. Most buildings in this region were built in 1984 and are Class A.