In the last 90 days, 0 listings have been made available, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About NaN% of the listings in the Mount Sinai are subleases, so you will probably have to focus your search on direct office leases. 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 properties in this region are approximately 2 floors. Most buildings in this area were built in 1988.