Most listings are in the $30's per square foot per year. The Darien submarket is seeing a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 3% decrease in rent.
Compared to the rest of the Fairfield market, the Darien submarket has higher rates, and you'll need to make a great offer to be in this hot region.
In the last 90 days, 8 listings have been listed, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 100% of the available leases in the Darien are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 6,540 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this area are around 2 floors. Most buildings in this area were built in 1980 and are Class A.