Compared to the rest of the East Bay market, the Contra Costa Centre submarket has more expensive rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 11 listings have come on the market, which means listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 9% of the available leases in the Contra Costa Centre 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.
Even though the median size is 3,360 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area are approximately 6 stories. Most buildings in this area were built in 1991 and are Class A.