The typical asking rate per listing is in the $10's per square foot per year. The Beltsville region is going through a a boost in rates. In the last 3 months, the median rate increased $4 per sqft per year. That's a 27% increase in rent.
Compared to the rest of the Washington D.C. market, the Beltsville submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 5 listings have been made available, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 20% of the available leases in the Beltsville 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 8,400 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this region are close to 1 floors. Most buildings in this market were built in 1987 and are Class A.