Most listings are in the $20's per square foot per year. The Humboldt submarket is seeing a an increase in rates. In the last 3 months, the median rate increased $3 per sqft per year. That's a 14% rise in rent.
In the last 90 days, 10 listings have been posted online, which means office spaces 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,250 sqft. Most properties in this market are around 2 stories. Most buildings in this market were built in 1965 and are Class C.