The typical asking rate per listing is in the $20's per square foot per year. The Loudoun County submarket is going through a an increase in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 4% rise in rent.
In the last 90 days, 34 listings have been listed, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About 353% of the office spaces in the Loudoun County 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.
Even though the median size is 2,940 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this area are close to 2 stories. Most buildings in this market were built in 2000 and are Class A.