Most listings are in the $20's per square foot per year. The Overland Park region is going through a a rise in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 1% increase in rent.
In the last 90 days, 242 listings have been made available, so you'll want to check back regularly for new listings. About 4% of the office spaces in the Overland Park are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 5,000 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this area are close to 2 floors. Most buildings in this area were built in 1984 and are Class B.