Most listings are in the $20's per square foot per year. The Kensington submarket is going through a an increase in rates. In the last 3 months, the median rate went up $29 per sqft per year. That's a Inf% rise in rent.
Compared to the rest of the Washington D.C. market, the Kensington region has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 1 listings have been listed, which means leases might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 1,620 sqft. Most buildings in this region are around 2 floors. Most buildings in this market were built in 1963 and are Class B.