Most listings are in the $30's per square foot per year. The Gaithersburg region is seeing a decrease in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 7% decline in rent.
Compared to the rest of the Washington D.C. market, the Gaithersburg submarket has more expensive rates, and you'll need to make a great offer to be in this hot submarket.
In the last 90 days, 24 listings have been posted online, which means spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 8% of the available leases in the Gaithersburg are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,120 sqft. Most properties in this area are around 2 stories. Most buildings in this area were built in 1989 and are Class B.