Most listings are in the $20's per square foot per year. The Marlow Heights region is seeing a a boost in rates. In the last 3 months, the median rate increased $28 per sqft per year.
Compared to the rest of the Washington D.C. market, the Marlow Heights region has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 4 listings have been listed, which means leases are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 325% of the available leases in the Marlow Heights are subleases, so you might be able to find a shorter term or below market rent. 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 region are around 2 stories. Most buildings in this region were built in 1971 and are Class B.