The typical asking rate per listing is 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 rose $1 per sqft per year. That's a 5% rise in rent.
In the last 90 days, 836 listings have been posted online, so you'll want to check back regularly for new listings. About 1% of the listings in the Kansas are subleases, so you will probably have to focus your search on direct office leases. 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 2,380 sqft. Most buildings in this market are approximately 2 floors. Most buildings in this area were built in 1984 and are Class B.