On average, listings lease in the $20's per square foot per year. The Marlow Heights region is experiencing a a boost in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 1% rise in rent.
Compared to the rest of the Washington D.C. market, the Marlow Heights submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 1 listings have been made available, which means leases are probably 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 700 sqft. Most buildings in this market are close to 1 stories. Most buildings in this area were built in 1968 and are Class B.