Most listings are in the $50's per square foot per year. The Greenwich region is going through a decrease in rates. In the last 3 months, the median rate decreased $40 per sqft per year. That's a 43% decrease in rent.
Compared to the rest of the Fairfield market, the Greenwich region has more expensive rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 21 listings have been posted online, which means listings 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 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 2,000 sqft. Most buildings in this market are around 3 floors. Most buildings in this market were built in 1974 and are Class A.