Most listings are in the $0's per square foot per year. The North Kansas City region is going through a decrease in rates. In the last 3 months, the median rate decreased $17 per sqft per year. That's a 100% decrease in rent.
In the last 90 days, 2 listings have been posted online, which means office spaces most likley are 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 1,800 sqft. Most properties in this area are approximately 1 floors. Most buildings in this area were built in 1950 and are Class B.