On average, listings lease in the $10's per square foot per year. The North Augusta submarket is going through a decline in rates. In the last 3 months, the median rate decreased $2 per sqft per year. That's a 14% decline in rent.
In the last 90 days, 1 listings have been posted online, which means new listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,750 sqft. Most buildings in this market were built in 1987 and are Class B.