The typical asking rate per listing is in the $20's per square foot per year. The Germantown submarket is going through a a boost in rates. In the last 3 months, the median rate rose $26 per sqft per year.
Compared to the rest of the Washington D.C. market, the Germantown region has lower rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 4 listings have been posted online, which means new listings might be leasing quickly. You'll want to be prepared to make an offer immediately. About 150% of the listings in the Germantown 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.
The standard measurement for office space in this area is around 1,800 sqft. Most properties in this region are approximately 2 stories. Most buildings in this region were built in 2002 and are Class B.