Most listings are in the $10's per square foot per year. The Oak Ridge submarket is going through a a boost in rates. In the last 3 months, the median rate rose $14 per sqft per year.
In the last 90 days, 2 listings have been listed, which means new listings most likley are leasing quickly. 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 1,270 sqft. Most properties in this area are around 1 floors. Most buildings in this area were built in 0 and are Class A.