Most listings are in the $20's per square foot per year. The Rosemont submarket is experiencing a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 3% decline in rent.
Compared to the rest of the Chicagoland market, the Rosemont submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 16 listings have been listed, which means new availabilities most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 200% of the available leases in the Rosemont are subleases, so you might be able to find a shorter term or below market rent. 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 7,770 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this market are approximately 11 floors. Most buildings in this market were built in 1988 and are Class A.