On average, listings lease in the $0's per square foot per year. The Potomac submarket is going through a decline in rates. In the last 3 months, the median rate decreased $38 per sqft per year. That's a 100% decrease in rent.
In the last 90 days, 6 listings have been listed, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 4,650 sqft, there are still 0 leases below 2,000 sqft. Most properties in this market are approximately 3 floors. Most buildings in this area were built in 1985 and are Class A.