Most listings are in the $10's per square foot per year. The Beavercreek submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $4 per sqft per year. That's a 17% decline in rent.
In the last 90 days, 14 listings have been posted online, which means listings 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.
The standard measurement for office space in this area is around 1,740 sqft. Most properties in this area are close to 2 stories. Most buildings in this market were built in 1989 and are Class A.