On average, listings lease in the $30's per square foot per year. The Reston submarket is going through a a rise in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 8% increase in rent.
Compared to the rest of the Washington D.C. market, the Reston submarket has higher rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 33 listings have been listed, which means listings are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 15% of the available leases in the Reston 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.
Even though the median size is 4,790 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this market are around 5 stories. Most buildings in this market were built in 1987 and are Class A.