Compared to the rest of the East Bay market, the Brentwood submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 20 listings have been posted online, which means listings might be going fast. You'll want to be prepared to make an offer immediately. About 5% of the available leases in the Brentwood are subleases, so you will probably have to focus your search on direct office leases. 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 1,940 sqft. Most buildings in this area are around 1 floors. Most buildings in this region were built in 2003 and are Class A.