Most listings are in the $20's per square foot per year. The Prairie Village submarket is experiencing a decline in rates. In the last 3 months, the median rate fell $5 per sqft per year. That's a 16% decline in rent.
In the last 90 days, 20 listings have been listed, which means new listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 30% of the available leases in the Prairie Village are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 1,270 sqft. Most properties in this market are around 2 stories. Most buildings in this market were built in 1972 and are Class B.