The typical asking rate per listing is in the $20's per square foot per year. The Kansas City region is going through a a boost in rates. In the last 3 months, the median rate rose $24 per sqft per year.
In the last 90 days, 64 listings have been made available, so you'll want to check back regularly for new listings. About 36% of the listings in the Kansas City 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 posted, so finding a space for a small business might be tough.
Even though the median size is 40,650 sqft, there are still 0 listings below 2,000 sqft. Most properties in this region are close to 2 floors. Most buildings in this region were built in 1967 and are Class B.