Compared to the rest of the Washington D.C. market, the Manassas Park submarket has more expensive rates, and you'll need to make a great offer to be in this hot region.
In the last 90 days, 16 listings have been posted online, which means new 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 460 sqft. Most buildings in this market were built in 1983 and are Class B.