Most listings are in the $20's per square foot per year. The Washington submarket is experiencing a an increase in rates. In the last 3 months, the median rate rose $24 per sqft per year.
In the last 90 days, 5 listings have been posted online, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. About 240% of the office spaces in the Washington are subleases, so you might be able to snag a great spot on a short term. 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 3,060 sqft, there are still 0 leases below 2,000 sqft. Most properties in this area are close to 2 stories. Most buildings in this area were built in 1977 and are Class B.