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 fell $0 per sqft per year. That's a 1% decline in rent.
In the last 90 days, 871 listings have been made available, 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,220 sqft. Most buildings in this region are close to 2 floors. Most buildings in this area were built in 1984 and are Class A.