The typical asking rate per listing is in the $10's per square foot per year. The Gahanna submarket is going through a a boost in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 4% increase in rent.
In the last 90 days, 23 listings have been made available, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. 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 3,240 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area are around 2 floors. Most buildings in this region were built in 1997 and are Class B.