Most listings are in the $30's per square foot per year. The Tarrytown submarket is experiencing a a boost in rates. In the last 3 months, the median rate went up $38 per sqft per year.
In the last 90 days, 2 listings have been listed, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 350% of the available leases in the Tarrytown are subleases, so you might be able to snag a great spot on a short term. 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 5,800 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this area are approximately 6 stories. Most buildings in this area were built in 1965 and are Class B.