Most listings are in the $20's per square foot per year. The Marlow Heights submarket is experiencing a decline in rates. In the last 3 months, the median rate fell $0 per sqft per year. That's a 0% decline in rent.
Compared to the rest of the Washington D.C. market, the Marlow Heights region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 4 listings have been made available, which means office spaces might be going fast. You'll want to be prepared to tour spaces as quick as possible. 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 470 sqft. Most properties in this area are around 2 stories. Most buildings in this area were built in 1971 and are Class B.