The typical asking rate per listing is in the $30's per square foot per year. The Falls Church region is going through a decrease in rates. In the last 3 months, the median rate fell $6 per sqft per year. That's a 17% decrease in rent.
Compared to the rest of the Washington D.C. market, the Falls Church region has smaller rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 9 listings have been made available, which means office spaces are probably going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,500 sqft. Most properties in this region are around 5 floors. Most buildings in this region were built in 1980 and are Class B.