In the last 90 days, 9114 listings have been made available, so you'll want to check back regularly for new listings. About 6% of the available leases in the California are subleases, so you will probably have to consider a longer term lease. 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 2,100 sqft. Most properties in this market are around 2 stories. Most buildings in this market were built in 1955 and are Class B.