Most listings are in the $20's per square foot per year. The Hackensack submarket is going through a a rise in rates. In the last 3 months, the median rate went up $21 per sqft per year.
In the last 90 days, 44 listings have been listed, so you'll want to check back regularly for new listings. About 50% of the available leases in the Hackensack are subleases, so you might be able to find a shorter term or below market rent. 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 1,200 sqft. Most buildings in this market are approximately 2 stories. Most buildings in this region were built in 1983 and are Class B.