Most listings are in the $10's per square foot per year. The North Kansas City submarket is going through a an increase in rates. In the last 3 months, the median rate rose $16 per sqft per year.
In the last 90 days, 22 listings have been listed, which means office spaces are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 14% of the listings in the North 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 4,200 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this market are close to 2 floors. Most buildings in this market were built in 1950 and are Class B.