Most listings are in the $20's per square foot per year. The Chesterfield County submarket is going through a an increase in rates. In the last 3 months, the median rate rose $5 per sqft per year. That's a 26% 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 make an offer immediately. About 6% of the available space in the Chesterfield County are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 1,600 sqft. Most properties in this area are close to 2 stories. Most buildings in this area were built in 1988 and are Class B.