Most listings are in the $20's per square foot per year. The Somerset County region is going through a a rise in rates. In the last 3 months, the median rate went up $24 per sqft per year.
In the last 90 days, 4 listings have come on the market, which means new availabilities most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 50% of the available leases in the Somerset County 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.
Even though the median size is 3,000 sqft, there are still 0 new availabilities below 2,000 sqft. Most buildings in this market were built in 1970 and are Class A.