On average, listings lease in the $10's per square foot per year. The West Haven submarket is seeing a a boost in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 1% increase in rent.
In the last 90 days, 8 listings have come on the market, which means spaces most likley are leasing quickly. 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 1,550 sqft. Most buildings in this market are around 1 floors. Most buildings in this region were built in 1969.