On average, listings lease in the $10's per square foot per year. The Mendocino region is going through a decline in rates. In the last 3 months, the median rate decreased $2 per sqft per year. That's a 12% decline in rent.
In the last 90 days, 3 listings have been listed, which means new availabilities are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 167% of the listings in the Mendocino are subleases, so you might be able to snag a great spot on a short term. 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 740 sqft. Most buildings in this market are around 1 stories. Most buildings in this region were built in 1988.