Most listings are in the $20's per square foot per year. The New Haven submarket is seeing a a rise in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 17% increase in rent.
In the last 90 days, 22 listings have been listed, which means listings are probably going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,140 sqft. Most properties in this region are approximately 3 floors. Most buildings in this area were built in 1926 and are Class B.