Most listings are in the $30's per square foot per year. The Pompton Lakes region is going through a an increase in rates. In the last 3 months, the median rate rose $11 per sqft per year. That's a 54% increase in rent.
In the last 90 days, 1 listings have been listed, which means new availabilities most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 300 sqft. Most buildings in this region were built in 1952 and are Class B.