On average, listings lease in the $10's per square foot per year. The Rock Island region is experiencing a a boost in rates. In the last 3 months, the median rate went up $15 per sqft per year.
In the last 90 days, 14 listings have been listed, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 29% of the listings in the Rock Island 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 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 1,650 sqft. Most properties in this region are around 2 stories. Most buildings in this region were built in 1964 and are Class B.