The typical asking rate per listing is in the $10's per square foot per year. The Mendocino region is experiencing a an increase in rates. In the last 3 months, the median rate went up $19 per sqft per year.
In the last 90 days, 3 listings have been listed, which means new listings most likley are 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 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 1,550 sqft. Most properties in this market are close to 1 stories. Most buildings in this market were built in 1988.