The typical asking rate per listing is in the $10's per square foot per year. The West Haven submarket is going through a a boost in rates. In the last 3 months, the median rate rose $17 per sqft per year.
In the last 90 days, 2 listings have been made available, which means listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 3,000 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this area are approximately 1 stories. Most buildings in this area were built in 1969.