Compared to the rest of the Washington D.C. market, the Bethesda submarket has greater rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 23 listings have been made available, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 87% of the available space in the Bethesda 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 1,620 sqft. Most properties in this area are close to 10 floors. Most buildings in this region were built in 1980 and are Class A.