Most listings are in the $30's per square foot per year. The California region is seeing a decrease in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 5% decrease in rent.
In the last 90 days, 9931 listings have been posted online, so you'll want to check back regularly for new listings. About 6% of the office spaces in the California 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,290 sqft. Most buildings in this region are approximately 2 stories. Most buildings in this market were built in 1956 and are Class B.