In the last 90 days, 30 listings have been posted online, which means spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 3% of the listings in the Martinez are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,090 sqft. Most properties in this market are around 2 floors. Most buildings in this area were built in 1996 and are Class B.