Most listings are in the $0's per square foot per year. The Boone region is experiencing a decrease in rates. In the last 3 months, the median rate decreased $35 per sqft per year. That's a 100% decline in rent.
In the last 90 days, 4 listings have come on the market, which means new availabilities 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around sqft. Most properties in this market are approximately 3 stories. Most buildings in this area were built in 2008 and are Class A.