Most listings are in the $20's per square foot per year. The Princeton submarket is going through a a boost in rates. In the last 3 months, the median rate increased $21 per sqft per year.
In the last 90 days, 7 listings have been listed, which means new availabilities are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 14% of the available space in the Princeton 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 on the market, so finding a space for a small business might be tough.
Even though the median size is 31,720 sqft, there are still 0 listings below 2,000 sqft. Most properties in this market are around 2 stories. Most buildings in this region were built in 1978 and are Class B.