Most listings are in the $0's per square foot per year. The Alexandria region is seeing a decrease in rates. In the last 3 months, the median rate decreased $18 per sqft per year. That's a 100% decrease in rent.
In the last 90 days, 22 listings have been posted online, which means spaces most likley are leasing quickly. 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 370 sqft. Most buildings in this area are approximately 1 floors. Most buildings in this region were built in 2003 and are Class A.