The typical asking rate per listing is in the $40's per square foot per year. The Tamalpais-Homestead Valley region is experiencing a a rise in rates. In the last 3 months, the median rate went up $45 per sqft per year. That's a Inf% increase in rent.
Compared to the rest of the Bay Area market, the Tamalpais-Homestead Valley submarket has higher rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 5 listings have been listed, which means office spaces are probably 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,270 sqft.