Compared to the rest of the Washington D.C. market, the Ashburn submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 8 listings have been posted online, which means leases are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 300% of the listings in the Ashburn are subleases, so you might be able to snag a great spot on a short term. 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 2,260 sqft. Most buildings in this region are close to 2 floors. Most buildings in this region were built in 2002 and are Class A.