Compared to the rest of the New York City market, the Brooklyn Heights region has greater rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 31 listings have been listed, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About 3% of the available space in the Brooklyn Heights are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 4,000 sqft, there are still 0 office spaces below 2,000 sqft. Most properties in this area are close to 12 stories. Most buildings in this area were built in 1920 and are Class B.
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 area. Commute by taxi is the most popular way to get to work amongst Brooklyn Heights residents. Commuting between 30 and 45 minutes a day is the norm for those who opt to reside in this part of town.