Most listings are in the $20's per square foot per year. The Bloomington submarket is going through a a boost in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 7% rise in rent.
In the last 90 days, 15 listings have come on the market, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 147% of the available leases in the Bloomington are subleases, so you might be able to snag a great spot on a short term. 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 1,590 sqft. Most buildings in this area are around 1 floors. Most buildings in this area were built in 1978 and are Class A.