Most listings are in the $20's per square foot per year. The La Plata region is going through a a rise in rates. In the last 3 months, the median rate went up $26 per sqft per year. That's a Inf% increase in rent.
Compared to the rest of the Washington D.C. market, the La Plata region has lower rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 1 listings have been made available, which means spaces are probably leasing quickly. 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 900 sqft.