Most listings are in the $20's per square foot per year. The Loudon County submarket is going through a an increase in rates. In the last 3 months, the median rate rose $12 per sqft per year. That's a 75% increase in rent.
In the last 90 days, 1 listings have been listed, which means office spaces are probably going fast. You'll want to be prepared to make an offer immediately. About 1,500% of the available leases in the Loudon County are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 5,000 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this region are around 1 stories. Most buildings in this region were built in 1965 and are Class A.