Most listings are in the $30's per square foot per year. The Oxon Hill region is going through a an increase in rates. In the last 3 months, the median rate went up $30 per sqft per year.
Compared to the rest of the Washington D.C. market, the Oxon Hill submarket has more expensive rates, and you'll need to pay a premium to be in this hot submarket.
In the last 90 days, 3 listings have been made available, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 890 sqft. Most properties in this area are close to 10 stories. Most buildings in this market were built in 1989 and are Class B.