In the last 90 days, 1 listings have been listed, which means leases are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 100% of the available leases in the Central Oakland are subleases, so you might be able to sign a shorter term by taking over a previous 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.
Even though the median size is 10,000 sqft, there are still 0 new listings below 2,000 sqft.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Information is the dominant industry in this area. Most of the folk of Central Oakland work from home. Commuting close to 20 minutes a day is the norm for those who opt to reside in this part of town.