Most listings are in the $10's per square foot per year. The Trumbull submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $4 per sqft per year. That's a 17% decrease in rent.
Compared to the rest of the Fairfield market, the Trumbull region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 7 listings have been listed, which means leases 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,770 sqft. Most properties in this market are approximately 3 floors. Most buildings in this market were built in 1986 and are Class B.