The typical asking rate per listing is in the $10's per square foot per year. The Botetourt County submarket is going through a a rise in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 8% increase in rent.
In the last 90 days, 12 listings have been listed, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 8% of the listings in the Botetourt County are subleases, so you will probably have to consider a longer term lease. 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 1,990 sqft. Most properties in this market are around 1 stories. Most buildings in this market were built in 2001 and are Class B.