The typical asking rate per listing is in the $20's per square foot per year. The Trumbull region is experiencing a a boost in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 6% rise 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, 8 listings have come on the market, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. 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 2,360 sqft. Most properties in this region are approximately 2 floors. Most buildings in this market were built in 1985 and are Class A.