The typical asking rate per listing is in the $10's per square foot per year. The Grass Valley region is going through a a boost in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 9% increase in rent.
Compared to the rest of the Greater Sacramento market, the Grass Valley region has smaller rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 17 listings have been posted online, which means new availabilities most likley are 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,200 sqft. Most properties in this region are close to 2 stories. Most buildings in this region were built in 1989 and are Class A.