On average, listings lease in the $20's per square foot per year. The Chillum region is going through a a boost in rates. In the last 3 months, the median rate increased $27 per sqft per year.
Compared to the rest of the Washington D.C. market, the Chillum submarket has lower rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 0 listings have been made available, which means spaces are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About NaN% of the office spaces in the Chillum 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,410 sqft. Most buildings in this market were built in 1986 and are Class C.