On average, listings lease in the $30's per square foot per year. The Washington D.C. submarket is experiencing a a boost in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 2% increase in rent.
In the last 90 days, 1803 listings have been listed, so you'll want to check back regularly for new listings. About 3% of the available leases in the Washington D.C. 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 3,470 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area are around 4 stories. Most buildings in this area were built in 1986 and are Class A.