Most listings are in the $20's per square foot per year. The New Haven region is seeing a decrease in rates. In the last 3 months, the median rate fell $6 per sqft per year. That's a 19% decrease in rent.
In the last 90 days, 32 listings have come on the market, which means new listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 3% of the available space in the New Haven are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 6,000 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this area are around 3 floors. Most buildings in this area were built in 1926 and are Class A.