Most listings are in the $10's per square foot per year. The Central Oakland region is seeing a a boost in rates. In the last 3 months, the median rate increased $14 per sqft per year.
Compared to the rest of the Pittsburgh market, the Central Oakland submarket has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 1 listings have been posted online, which means leases most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. 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 2,200 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 market. 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.