The typical asking rate per listing is in the $20's per square foot per year. The Leesburg submarket is experiencing a decline in rates. In the last 3 months, the median rate fell $7 per sqft per year. That's a 19% decline in rent.
Compared to the rest of the Washington D.C. market, the Leesburg region has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 4 listings have been listed, which means new availabilities most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 350% of the listings in the Leesburg are subleases, so you might be able to find a shorter term or below market rent. 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 1,720 sqft. Most buildings in this region are approximately 3 stories. Most buildings in this market were built in 1990 and are Class B.