The typical asking rate per listing is in the $10's per square foot per year. The Humboldt region is seeing a a rise in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 8% rise in rent.
In the last 90 days, 14 listings have been posted online, which means leases are probably leasing quickly. 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 1,250 sqft. Most properties in this area are approximately 2 stories. Most buildings in this market were built in 1951.