Most listings are in the $50's per square foot per year. The Arlington County submarket is going through a a rise in rates. In the last 3 months, the median rate rose $3 per sqft per year. That's a 5% increase in rent.
In the last 90 days, 68 listings have been made available, so you'll want to check back regularly for new listings. About 3% of the available leases in the Arlington County are subleases, so you will probably have to focus your search on direct office leases. 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 6,550 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this market are close to 11 floors. Most buildings in this area were built in 1986 and are Class A.