The typical asking rate per listing is in the $10's per square foot per year. The Louisville 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 6% decline in rent.
In the last 90 days, 20 listings have come on the market, which means leases might be going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,150 sqft. Most buildings in this region are around 2 stories. Most buildings in this area were built in 1999 and are Class A.