Compared to the rest of the Bay Area market, the Lucas Valley-Marinwood submarket has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 7 listings have been made available, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. 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 240 sqft. Most buildings in this region were built in 1980 and are Class A.