The typical asking rate per listing is in the $10's per square foot per year. The Johnson County region is seeing a a boost in rates. In the last 3 months, the median rate rose $19 per sqft per year.
In the last 90 days, 40 listings have come on the market, which means leases are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 60% of the available leases in the Johnson County 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 1,880 sqft. Most buildings in this market are around 2 stories. Most buildings in this region were built in 1999 and are Class A.