Most listings are in the $20's per square foot per year. The South Carolina region is going through a a rise in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 9% increase in rent.
In the last 90 days, 604 listings have been made available, so you'll want to check back regularly for new listings. About 4% of the available space in the South Carolina are subleases, so you will probably have to focus your search on direct office leases. 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 2,420 sqft. Most buildings in this region are approximately 2 floors. Most buildings in this area were built in 1987 and are Class B.