Most listings are in the $30's per square foot per year. The Annandale region is experiencing a a rise in rates. In the last 3 months, the median rate went up $8 per sqft per year. That's a 27% increase in rent.
Compared to the rest of the Washington D.C. market, the Annandale submarket has more expensive rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 4 listings have been posted online, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. About 125% of the available leases in the Annandale 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 available, so finding a space for a small business might be tough.
Even though the median size is 7,430 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this region are close to 4 stories. Most buildings in this area were built in 1986 and are Class A.