On average, listings lease 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 $1 per sqft per year. That's a 4% rise in rent.
Compared to the rest of the Kansas City market, the Kansas City submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 407 listings have been made available, so you'll want to check back regularly for new listings. About 2% of the listings in the Kansas City are subleases, so you will probably have to consider a longer term lease. 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 4,900 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this market are around 2 floors. Most buildings in this market were built in 1966 and are Class B.