On average, listings lease in the $60's per square foot per year. The Central Oakland region is going through a an increase in rates. In the last 3 months, the median rate went up $12 per sqft per year. That's a 21% rise in rent.
In the last 90 days, 147 listings have come on the market, so you'll want to check back regularly for new listings. About 5% of the available space in the Central Oakland 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 2,300 sqft. Most properties in this area are close to 3 stories. Most buildings in this market were built in 1949 and are Class B.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Waste services is the dominant industry in this region. Most of the folk of Central Oakland work from home. Commuting between 30 and 45 minutes a day is the norm for those who opt to reside in this part of town.