Compared to the rest of the Washington D.C. market, the Dulles Town Center submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 19 listings have been made available, which means office spaces most likley are leasing quickly. 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 2,940 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this area are around 1 floors. Most buildings in this region were built in 2001 and are Class A.