Most listings are in the $10's per square foot per year. The Shawnee region is going through a decrease in rates. In the last 3 months, the median rate fell $8 per sqft per year. That's a 31% decrease in rent.
In the last 90 days, 34 listings have been made available, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 18% of the available leases in the Shawnee 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,250 sqft. Most properties in this market are approximately 2 floors. Most buildings in this area were built in 2003 and are Class A.