Most listings are in the $10's per square foot per year. The Vandalia submarket is going through a decline in rates. In the last 3 months, the median rate fell $4 per sqft per year. That's a 19% decrease in rent.
In the last 90 days, 14 listings have been listed, which means new listings are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 50% of the office spaces in the Vandalia 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,210 sqft. Most properties in this area are around 2 floors. Most buildings in this region were built in 1979 and are Class B.