Most listings are in the $0's per square foot per year. The Kensington region is seeing a decline in rates. In the last 3 months, the median rate decreased $26 per sqft per year. That's a 100% decrease in rent.
In the last 90 days, 5 listings have come on the market, which means spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. 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 sqft. Most buildings in this market are close to 2 floors. Most buildings in this market were built in 1963 and are Class B.