The typical asking rate per listing is in the $20's per square foot per year. The Passaic County submarket is seeing a an increase in rates. In the last 3 months, the median rate increased $5 per sqft per year. That's a 26% increase in rent.
In the last 90 days, 25 listings have come on the market, which means listings are probably going fast. You'll want to be prepared to make an offer immediately. About 8% of the available leases in the Passaic County are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,650 sqft. Most buildings in this area are around 2 stories. Most buildings in this area were built in 1975 and are Class B.