On average, listings lease in the $40's per square foot per year. The Newark region is going through a a rise in rates. In the last 3 months, the median rate went up $9 per sqft per year. That's a 27% rise in rent.
Compared to the rest of the East Bay market, the Newark submarket has higher rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 24 listings have been made available, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. About 4% of the available leases in the Newark are subleases, so you will probably have to consider a longer term lease. 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 180 sqft. Most buildings in this area are approximately 1 floors. Most buildings in this area were built in 1996 and are Class A.