Most listings are in the $40's per square foot per year. The Tamalpais-Homestead Valley submarket is seeing a a boost in rates. In the last 3 months, the median rate went up $45 per sqft per year. That's a Inf% rise in rent.
Compared to the rest of the Bay Area market, the Tamalpais-Homestead Valley region has greater rates, and you'll need to pay a premium to be in this hot submarket.
In the last 90 days, 5 listings have been made available, which means spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,270 sqft.