The typical asking rate per listing is in the $20's per square foot per year. The Chesterfield submarket is going through a an increase in rates. In the last 3 months, the median rate rose $4 per sqft per year. That's a 18% increase in rent.
In the last 90 days, 19 listings have come on the market, which means new availabilities might be leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,940 sqft. Most properties in this area are around 3 floors. Most buildings in this region were built in 1998 and are Class B.