The typical asking rate per listing is in the $20's per square foot per year. The River West submarket is going through a decline in rates. In the last 3 months, the median rate decreased $3 per sqft per year. That's a 10% decline in rent.
Compared to the rest of the Chicagoland market, the River West submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 4 listings have come on the market, which means new listings most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. 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 1,470 sqft. Most buildings in this area are close to 3 floors. Most buildings in this area were built in 1998 and are Class B.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Education is the dominant industry in this region. Most of the folk of River West work from home. Commuting around 15 minutes a day is the norm for those who opt to reside in this part of town.