The typical asking rate per listing is in the $20's per square foot per year. The Oak Grove submarket is experiencing a a rise in rates. In the last 3 months, the median rate went up $9 per sqft per year. That's a 56% rise in rent.
Compared to the rest of the Washington D.C. market, the Oak Grove region has lower rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 10 listings have been made available, which means listings most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 10% of the office spaces in the Oak Grove 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 2,392 sqft. Most properties in this area are close to 2 floors. Most buildings in this area were built in 1989 and are Class B.