Compared to the rest of the Bay Area market, the Sebastopol submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 6 listings have come on the market, which means new availabilities are probably 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 590 sqft. Most properties in this market are around 2 floors. Most buildings in this area were built in 1991 and are Class B.