Most listings are in the $10's per square foot per year. The Riverdale region is going through a a boost in rates. In the last 3 months, the median rate went up $5 per sqft per year. That's a 32% rise in rent.
Compared to the rest of the Metro Atlanta market, the Riverdale region has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 4 listings have been listed, which means spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 3,680 sqft, there are still 0 listings below 2,000 sqft. Most buildings in this region are close to 1 floors. Most buildings in this market were built in 2003 and are Class B.