The typical asking rate per listing is in the $20's per square foot per year. The Loudoun County submarket is seeing a decline in rates. In the last 3 months, the median rate fell $5 per sqft per year. That's a 15% decrease in rent.
In the last 90 days, 34 listings have come on the market, which means listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 6% of the available leases in the Loudoun County are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 2,760 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this area are approximately 1 floors. Most buildings in this region were built in 2000 and are Class A.