The typical asking rate per listing is in the $30's per square foot per year. The Germantown submarket is going through a a rise in rates. In the last 3 months, the median rate went up $33 per sqft per year.
In the last 90 days, 2 listings have been made available, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 250% of the office spaces in the Germantown are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 1,970 sqft. Most properties in this area are around 2 stories. Most buildings in this region were built in 1996 and are Class B.