Most listings are in the $10's per square foot per year. The Columbus submarket is experiencing a an increase in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 13% rise in rent.
In the last 90 days, 2 listings have come on the market, which means new listings are probably going fast. 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 800 sqft. Most buildings in this region are around 1 floors. Most buildings in this area were built in 1977 and are Class B.