In the last 90 days, 0 listings have come on the market, which means listings are probably going fast. You'll want to be prepared to make an offer immediately. About NaN% of the available space in the Roslyn 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.
The standard measurement for office space in this area is around sqft. Most buildings in this area were built in 1900 and are Class C.