Most listings are in the $30's per square foot per year. The North Bay region is going through a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 4% decline in rent.
In the last 90 days, 352 listings have been made available, so you'll want to check back regularly for new listings. About 3% of the available leases in the North Bay are subleases, so you will probably need to sign a longer term lease with the landlord directly. 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 1,660 sqft. Most buildings in this area are close to 2 stories. Most buildings in this area were built in 1984 and are Class A.