The typical asking rate per listing is in the $50's per square foot per year. The Boone County region is going through a an increase in rates. In the last 3 months, the median rate rose $51 per sqft per year.
In the last 90 days, 5 listings have been listed, which means listings might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 40% of the available space in the Boone County are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 300 sqft. Most properties in this market are close to 1 floors. Most buildings in this market were built in 1925 and are Class B.