Compared to the rest of the Washington D.C. market, the Annandale submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 4 listings have been listed, which means new availabilities are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 225% of the office spaces in the Annandale are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 5,630 sqft, there are still 0 new availabilities below 2,000 sqft. Most properties in this region are around 4 stories. Most buildings in this area were built in 1986 and are Class A.