Most listings are in the $20's per square foot per year. The Falls Church submarket is going through a decrease in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 8% decline 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, 1 listings have been posted online, which means listings might be going fast. You'll want to be prepared to make an offer immediately. About 1,000% of the listings in the Falls Church are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,050 sqft. Most properties in this area are approximately 2 stories. Most buildings in this region were built in 1980 and are Class B.