In the last 90 days, 0 listings have come on the market, which means office spaces are probably going fast. You'll want to be prepared to make an offer immediately. About NaN% of the listings in the North East are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around sqft. Most properties in this market are close to 2 stories. Most buildings in this market were built in 1890 and are Class B.