The typical asking rate per listing is in the $20's per square foot per year. The Washington region is experiencing a decrease in rates. In the last 3 months, the median rate decreased $0 per sqft per year. That's a 2% decline in rent.
In the last 90 days, 963 listings have been listed, so you'll want to check back regularly for new listings. About 6% of the office spaces in the Washington are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 2,340 sqft. Most buildings in this region are close to 2 stories. Most buildings in this market were built in 1983 and are Class A.