On average, listings lease in the $10's per square foot per year. The Shasta submarket is going through a an increase in rates. In the last 3 months, the median rate rose $16 per sqft per year.
In the last 90 days, 83 listings have come on the market, so you'll want to check back regularly for new listings. About 54% of the listings in the Shasta are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 1,050 sqft. Most buildings in this region are around 2 floors. Most buildings in this area were built in 1989 and are Class B.