The typical asking rate per listing is in the $30's per square foot per year. The Silver Spring submarket is going through a decrease in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 5% decline in rent.
Compared to the rest of the Washington D.C. market, the Silver Spring region has higher rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 2 listings have been listed, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 250% of the listings in the Silver Spring 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,840 sqft. Most properties in this market are approximately 9 stories. Most buildings in this region were built in 1976 and are Class A.