The typical asking rate per listing is in the $10's per square foot per year. The Kansas City submarket is going through a decrease in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 10% decline in rent.
In the last 90 days, 32 listings have been listed, which means office spaces might be leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,430 sqft. Most buildings in this market are around 2 floors. Most buildings in this region were built in 1967 and are Class B.