On average, listings lease in the $10's per square foot per year. The La Plata region is experiencing a an increase in rates. In the last 3 months, the median rate went up $18 per sqft per year.
Compared to the rest of the Washington D.C. market, the La Plata region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 8 listings have been listed, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 75% of the available leases in the La Plata 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,180 sqft. Most properties in this market are close to 4 stories. Most buildings in this area were built in 2006 and are Class A.