On average, listings lease in the $20's per square foot per year. The Lenexa submarket is going through a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 5% decrease in rent.
In the last 90 days, 35 listings have been made available, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 3% of the listings 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 posted, so finding a space for a small business might be tough.
Even though the median size is 4,430 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this area are approximately 1 floors. Most buildings in this market were built in 1987 and are Class B.