On average, listings lease in the $20's per square foot per year. The Waldorf region is going through a a rise in rates. In the last 3 months, the median rate went up $25 per sqft per year. That's a Inf% increase in rent.
Compared to the rest of the Washington D.C. market, the Waldorf region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 7 listings have come on the market, which means office spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. 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 1,500 sqft. Most buildings in this market are around 2 floors. Most buildings in this market were built in 1987 and are Class A.