On average, listings lease in the $30's per square foot per year. The Gaithersburg submarket is experiencing a decline 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 region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 20 listings have been posted online, which means new listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 10% of the available leases in the Gaithersburg are subleases, so you will probably have to focus your search on direct office leases. 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 2,220 sqft. Most properties in this market are around 2 floors. Most buildings in this region were built in 1989 and are Class B.