Most listings are in the $30's per square foot per year. The Trenton region is going through a an increase in rates. In the last 3 months, the median rate went up $10 per sqft per year. That's a 41% rise in rent.
In the last 90 days, 17 listings have come on the market, which means listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,550 sqft. Most properties in this region are around 3 floors. Most buildings in this region were built in 1953 and are Class A.