On average, listings lease in the $0's per square foot per year. The Carroll Gardens region is going through a decrease in rates. In the last 3 months, the median rate fell $63 per sqft per year. That's a 100% decrease in rent.
In the last 90 days, 6 listings have been posted online, which means spaces most likley are 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 2,000 sqft. Most properties in this area are around 3 stories. Most buildings in this region were built in 1931.
Not much of the real estate is used for commercial space, so it might be hard to find office space. Health care is the dominant industry in this region. Most of the folk of Carroll Gardens work from home. Commuting around 30 minutes a day is the norm for those who opt to reside in this part of town.