Most listings are in the $20's per square foot per year. The Grass Valley submarket is going through a an increase in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 17% rise in rent.
Compared to the rest of the Greater Sacramento market, the Grass Valley submarket has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 5 listings have been posted online, which means new availabilities most likley are leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 2,720 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this market are around 2 stories. Most buildings in this area were built in 1990 and are Class A.