On average, listings lease in the $10's per square foot per year. The Anderson County submarket is going through a a rise in rates. In the last 3 months, the median rate went up $4 per sqft per year. That's a 25% increase in rent.
In the last 90 days, 12 listings have been posted online, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 17% of the office spaces in the Anderson 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.
The standard measurement for office space in this area is around 1,500 sqft. Most buildings in this market are approximately 1 floors. Most buildings in this area were built in 1999 and are Class B.