On average, listings lease in the $20's per square foot per year. The Terre Haute region is going through a a rise in rates. In the last 3 months, the median rate rose $20 per sqft per year.
In the last 90 days, 3 listings have been listed, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. 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 2,200 sqft. Most buildings in this area are around 1 floors. Most buildings in this market were built in 1975 and are Class A.