The typical asking rate per listing is in the $10's per square foot per year. The Rock Island region is going through a decrease in rates. In the last 3 months, the median rate decreased $7 per sqft per year. That's a 29% decrease in rent.
In the last 90 days, 14 listings have been posted online, which means leases are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 7% of the listings in the Rock Island are subleases, so you will probably have to consider a longer term lease. 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 5,500 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this region are around 2 stories. Most buildings in this area were built in 1964 and are Class B.