On average, listings lease in the $20's per square foot per year. The Chantilly region is seeing a an increase in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 7% increase in rent.
Compared to the rest of the Washington D.C. market, the Chantilly region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 15 listings have been made available, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 3,310 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this market are close to 2 floors. Most buildings in this area were built in 1997 and are Class A.