The typical asking rate per listing is in the $10's per square foot per year. The Roanoke submarket is going through a a boost in rates. In the last 3 months, the median rate increased $2 per sqft per year. That's a 9% rise in rent.
In the last 90 days, 33 listings have been listed, which means listings might be 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 1,550 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this region were built in 1953 and are Class B.