On average, listings lease in the $50's per square foot per year. The West Haven region is going through a an increase in rates. In the last 3 months, the median rate went up $38 per sqft per year. That's a 172% rise in rent.
In the last 90 days, 19 listings have been listed, which means new availabilities might be 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.
The standard measurement for office space in this area is around 1,830 sqft. Most buildings in this market are around 1 stories. Most buildings in this area were built in 1961.