Most listings are 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 $56 per sqft per year. That's a 68% decrease in rent.
Compared to the rest of the Washington D.C. market, the Leesburg region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 6 listings have come on the market, which means listings are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 1,920 sqft. Most properties in this region are close to 3 stories. Most buildings in this region were built in 1990 and are Class B.