Most listings are in the $10's per square foot per year. The Gloucester County region is going through a decline in rates. In the last 3 months, the median rate decreased $12 per sqft per year. That's a 43% decrease in rent.
In the last 90 days, 39 listings have been posted online, which means leases most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 90% of the listings in the Gloucester County 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,100 sqft. Most properties in this market are approximately 1 stories. Most buildings in this market were built in 1980 and are Class B.