The typical asking rate per listing is in the $10's per square foot per year. The Roanoke submarket is seeing 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, 36 listings have been posted online, which means new availabilities 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 on the market, 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 properties in this region are around 2 floors. Most buildings in this market were built in 1953 and are Class B.