On average, listings lease in the $20's per square foot per year. The Decatur submarket is going through a an increase in rates. In the last 3 months, the median rate rose $4 per sqft per year. That's a 24% increase in rent.
In the last 90 days, 4 listings have come on the market, which means new availabilities 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,200 sqft. Most buildings in this area are close to 2 stories. Most buildings in this market were built in 2014 and are Class A.