Most listings are in the $10's per square foot per year. The Fairborn region is going through a decrease in rates. In the last 3 months, the median rate fell $8 per sqft per year. That's a 33% decline in rent.
In the last 90 days, 1 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. About 100% of the listings in the Fairborn are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,400 sqft. Most buildings in this area are close to 3 stories. Most buildings in this area were built in 1988 and are Class B.