Most listings are in the $10's per square foot per year. The Bettendorf submarket is experiencing a a rise in rates. In the last 3 months, the median rate rose $16 per sqft per year.
In the last 90 days, 18 listings have been listed, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 28% of the available space in the Bettendorf 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 4,200 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this market are approximately 1 stories. Most buildings in this area were built in 1981 and are Class A.