The typical asking rate per listing is in the $30's per square foot per year. The Newark submarket is seeing a an increase in rates. In the last 3 months, the median rate rose $8 per sqft per year. That's a 36% rise in rent.
Compared to the rest of the East Bay market, the Newark submarket has smaller rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 17 listings have been made available, which means new availabilities most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,860 sqft. Most properties in this market are around 1 floors. Most buildings in this market were built in 1998 and are Class A.