Most listings are in the $10's per square foot per year. The Anderson County region is going through a a rise in rates. In the last 3 months, the median rate increased $4 per sqft per year. That's a 25% rise in rent.
In the last 90 days, 18 listings have been posted online, which means new availabilities most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 11% of the available leases in the Anderson County are subleases, so you might be able to snag a great spot on a short term. 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 2,000 sqft. Most buildings in this market are approximately 1 floors. Most buildings in this region were built in 1999 and are Class A.