On average, listings lease in the $20's per square foot per year. The Kansas region is going through a an increase in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 12% rise in rent.
In the last 90 days, 886 listings have been posted online, so you'll want to check back regularly for new listings. About 28% of the available space in the Kansas 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,000 sqft. Most buildings in this market are approximately 2 stories. Most buildings in this market were built in 1982 and are Class B.