Most listings are in the $30's per square foot per year. The East Bay region is seeing a an increase in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 0% increase in rent.
Compared to the rest of the East Bay market, the East Bay submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued region.
In the last 90 days, 1031 listings have come on the market, so you'll want to check back regularly for new listings. About 6% of the office spaces in the East 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 2,370 sqft. Most buildings in this area are close to 2 floors. Most buildings in this market were built in 1983 and are Class A.