Most listings are in the $50's per square foot per year. The Ross region is going through a decline in rates. In the last 3 months, the median rate decreased $4 per sqft per year. That's a 7% decrease in rent.
Compared to the rest of the Bay Area market, the Ross region has greater rates, and you'll need to pay a premium to be in this hot submarket.
In the last 90 days, 1 listings have been posted online, which means new availabilities 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 on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 750 sqft. Most buildings in this market were built in 1936 and are Class B.