The typical asking rate per listing is in the $10'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 20% rise in rent.
In the last 90 days, 1 listings have come on the market, which means new listings are probably going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 280 sqft. Most properties in this area are around 2 floors. Most buildings in this region were built in 1980.