Most listings are in the $30's per square foot per year. The Shasta submarket is going through a a rise in rates. In the last 3 months, the median rate went up $12 per sqft per year. That's a 60% rise in rent.
In the last 90 days, 8 listings have been posted online, which means new availabilities might be 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,500 sqft. Most properties in this region are approximately 2 floors. Most buildings in this area were built in 1989 and are Class B.