On average, listings lease in the $30's per square foot per year. The Lucas Valley-Marinwood submarket is experiencing a a rise in rates. In the last 3 months, the median rate went up $36 per sqft per year.
Compared to the rest of the Bay Area market, the Lucas Valley-Marinwood region has lower rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 7 listings have come on the market, which means new listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 43% of the available space in the Lucas Valley-Marinwood are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 area were built in 1980 and are Class A.