Most listings are in the $30's per square foot per year. The Reston submarket is seeing a decline in rates. In the last 3 months, the median rate decreased $1 per sqft per year. That's a 4% decrease in rent.
Compared to the rest of the Washington D.C. market, the Reston region has greater rates, and you'll need to make a great offer to be in this hot submarket.
In the last 90 days, 33 listings have been posted online, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 9% of the available leases in the Reston are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 4,520 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this area are around 5 floors. Most buildings in this region were built in 1987 and are Class A.