The typical asking rate per listing is in the $10's per square foot per year. The Leawood region is going through a decline in rates. In the last 3 months, the median rate decreased $6 per sqft per year. That's a 22% decrease in rent.
In the last 90 days, 52 listings have been listed, so you'll want to check back regularly for new listings. About 4% of the listings in the Leawood are subleases, so you will probably have to consider a longer term lease. 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 3,460 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this area are around 2 floors. Most buildings in this market were built in 2000 and are Class B.