On average, listings lease in the $40's per square foot per year. The Arlington County region is seeing a decline in rates. In the last 3 months, the median rate decreased $3 per sqft per year. That's a 6% decline in rent.
In the last 90 days, 35 listings have been made available, which means spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 17% of the office spaces in the Arlington County 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 posted, so finding a space for a small business might be tough.
Even though the median size is 4,430 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area are approximately 12 floors. Most buildings in this region were built in 1986 and are Class A.