On average, listings lease in the $20's per square foot per year. The Athens-Clarke County unified government (balance) submarket is going through a a rise in rates. In the last 3 months, the median rate increased $22 per sqft per year.
In the last 90 days, 10 listings have been made available, which means 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,320 sqft. Most properties in this market are close to 2 floors. Most buildings in this market were built in 1991 and are Class B.