Most listings are in the $10's per square foot per year. The Roanoke region is experiencing a a boost in rates. In the last 3 months, the median rate increased $2 per sqft per year. That's a 9% increase in rent.
In the last 90 days, 33 listings have come on the market, which means office spaces 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 1,950 sqft. Most properties in this market are around 2 floors. Most buildings in this market were built in 1953 and are Class B.