The typical asking rate per listing is in the $20's per square foot per year. The Lenexa submarket is going through a decline in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 5% decrease in rent.
In the last 90 days, 34 listings have been made available, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 3% of the available space in the Lenexa are subleases, so you will probably need to consider the implications of signing a direct lease with the building. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 5,100 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this area are close to 1 stories. Most buildings in this market were built in 1987 and are Class B.