The typical asking rate per listing is in the $10's per square foot per year. The Bloomington region is seeing a a rise in rates. In the last 3 months, the median rate went up $4 per sqft per year. That's a 25% rise in rent.
In the last 90 days, 40 listings have been made available, which means new availabilities most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 3% of the listings in the Bloomington are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,250 sqft. Most buildings in this region are close to 1 stories. Most buildings in this area were built in 1977 and are Class A.