Most listings are in the $20's per square foot per year. The South Jersey submarket is going through a a boost in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 9% increase in rent.
In the last 90 days, 367 listings have been posted online, so you'll want to check back regularly for new listings. About 1% of the available space in the South Jersey are subleases, so you will probably have to focus your search on direct office leases. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,500 sqft. Most buildings in this area are around 2 stories. Most buildings in this market were built in 1986 and are Class A.