Most listings are in the $10's per square foot per year. The Iowa region is seeing a decrease in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 3% decrease in rent.
In the last 90 days, 1192 listings have come on the market, so you'll want to check back regularly for new listings. About 38% of the listings in the Iowa are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,500 sqft. Most properties in this area are around 1 floors. Most buildings in this area were built in 1983 and are Class A.