The typical asking rate per listing is in the $10's per square foot per year. The Riverdale submarket is going through a a rise in rates. In the last 3 months, the median rate increased $19 per sqft per year.
Compared to the rest of the Metro Atlanta market, the Riverdale submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 4 listings have come on the market, which means leases are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 75% of the available space in the Riverdale 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 3,680 sqft, there are still 0 leases below 2,000 sqft. Most properties in this area are approximately 2 stories. Most buildings in this region were built in 2003 and are Class B.