Most listings are in the $20's per square foot per year. The Danbury region is going through a a rise in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 18% rise in rent.
Compared to the rest of the Fairfield market, the Danbury submarket has less expensive rates, so you should have no trouble finding a great deal in this discounted submarket.
In the last 90 days, 46 listings have been posted online, so you'll want to check back regularly for new listings. About 2% of the office spaces in the Danbury are subleases, so you will probably have to consider a longer term lease. 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 1,800 sqft. Most properties in this market are approximately 2 stories. Most buildings in this region were built in 1978 and are Class A.