The typical asking rate per listing is in the $10's per square foot per year. The North Haven region is experiencing a decrease in rates. In the last 3 months, the median rate decreased $6 per sqft per year. That's a 24% decrease in rent.
In the last 90 days, 7 listings have been posted online, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About 171% of the available leases in the North Haven are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,110 sqft. Most properties in this region are close to 2 stories. Most buildings in this region were built in 1972 and are Class B.