Most listings are in the $10's per square foot per year. The Roanoke County region is seeing a an increase in rates. In the last 3 months, the median rate increased $17 per sqft per year.
In the last 90 days, 14 listings have been listed, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 50% of the office spaces in the Roanoke County are subleases, so you might be able to find a shorter term or below market rent. 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 2,450 sqft. Most properties in this region are around 2 floors. Most buildings in this region were built in 1988 and are Class B.