On average, listings lease in the $20's per square foot per year. The Grass Valley region is seeing a a rise in rates. In the last 3 months, the median rate increased $3 per sqft per year. That's a 17% increase in rent.
Compared to the rest of the Greater Sacramento market, the Grass Valley submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 9 listings have come on the market, which means new availabilities 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 available, 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 properties in this area are around 2 stories. Most buildings in this region were built in 1990 and are Class A.