Most listings are in the $50's per square foot per year. The Newark submarket is going through a a boost in rates. In the last 3 months, the median rate went up $10 per sqft per year. That's a 22% rise in rent.
Compared to the rest of the East Bay market, the Newark region has greater rates, and you'll need to pay a premium to be in this hot region.
In the last 90 days, 24 listings have been posted online, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 570 sqft. Most properties in this area are around 1 floors. Most buildings in this region were built in 1996 and are Class A.