Most listings are in the $20's per square foot per year. The Trumbull region is going through a an increase in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 13% rise in rent.
Compared to the rest of the Fairfield market, the Trumbull submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 14 listings have been posted online, which means new listings 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 1,950 sqft. Most buildings in this area are approximately 3 floors. Most buildings in this region were built in 1986 and are Class B.