Most listings are in the $10's per square foot per year. The Vanderburgh County submarket is going through a decrease in rates. In the last 3 months, the median rate fell $3 per sqft per year. That's a 17% decline in rent.
In the last 90 days, 73 listings have been listed, so you'll want to check back regularly for new listings. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 850 sqft. Most properties in this market are around 1 stories. Most buildings in this region were built in 1958 and are Class B.