Most listings are in the $20's per square foot per year. The North Haven region is going through a a boost in rates. In the last 3 months, the median rate increased $8 per sqft per year. That's a 50% rise in rent.
In the last 90 days, 7 listings have come on the market, which means listings most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,110 sqft. Most properties in this area are approximately 2 floors. Most buildings in this market were built in 1986 and are Class B.