The typical asking rate per listing is in the $20's per square foot per year. The Jefferson County submarket is going through a an increase in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 3% increase in rent.
In the last 90 days, 146 listings have been listed, so you'll want to check back regularly for new listings. About 1% of the available leases in the Jefferson County 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 2,740 sqft, there are still 0 listings below 2,000 sqft. Most properties in this area are around 2 stories. Most buildings in this area were built in 1900 and are Class B.