The typical asking rate per listing is in the $10's per square foot per year. The Powhatan County submarket is going through a a rise in rates. In the last 3 months, the median rate went up $20 per sqft per year.
In the last 90 days, 2 listings have been listed, which means new listings might be going fast. You'll want to be prepared to make an offer immediately. About 150% of the available leases in the Powhatan 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 550 sqft. Most buildings in this market are close to 1 stories. Most buildings in this area were built in 2008 and are Class C.