Most listings are in the $30's per square foot per year. The Newark region is seeing a a boost in rates. In the last 3 months, the median rate increased $15 per sqft per year. That's a 73% rise in rent.
Compared to the rest of the East Bay market, the Newark region has lower rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 23 listings have been listed, which means new listings most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 4% of the available space in the Newark are subleases, so you will probably need to consider the implications of signing a direct lease with the building. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,900 sqft. Most properties in this market are approximately 1 floors. Most buildings in this market were built in 1996 and are Class A.