The typical asking rate per listing is in the $10's per square foot per year. The South Plainfield region is going through a decrease in rates. In the last 3 months, the median rate decreased $5 per sqft per year. That's a 19% decline in rent.
In the last 90 days, 17 listings have come on the market, which means spaces are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 35% of the office spaces in the South Plainfield are subleases, so you might be able to snag a great spot on a short term. 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 1,880 sqft. Most buildings in this region are close to 2 floors. Most buildings in this area were built in 1986 and are Class B.