On average, listings lease in the $20's per square foot per year. The Smithtown region is experiencing a an increase in rates. In the last 3 months, the median rate went up $25 per sqft per year.
In the last 90 days, 4 listings have been listed, which means listings most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 175% of the listings in the Smithtown are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 800 sqft. Most buildings in this region are around 2 floors. Most buildings in this region were built in 1987 and are Class B.