Most listings are in the $10's per square foot per year. The Evansville submarket is going through a a boost in rates. In the last 3 months, the median rate increased $16 per sqft per year.
In the last 90 days, 70 listings have been posted online, so you'll want to check back regularly for new listings. About 99% of the office spaces in the Evansville are subleases, so you might be able to find a shorter term or below market rent. 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 850 sqft. Most properties in this market are around 1 floors. Most buildings in this region were built in 1957 and are Class B.