Most listings are in the $30's per square foot per year. The Newark region is going through a an increase in rates. In the last 3 months, the median rate rose $39 per sqft per year.
Compared to the rest of the East Bay market, the Newark submarket has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 24 listings have been posted online, which means new availabilities are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 21% of the available space in the Newark are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 1,810 sqft. Most buildings in this market are approximately 1 stories. Most buildings in this region were built in 1996 and are Class A.