Most listings are in the $20's per square foot per year. The Central Islip submarket is seeing a an increase in rates. In the last 3 months, the median rate increased $25 per sqft per year.
In the last 90 days, 6 listings have been made available, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 17% of the available leases in the Central Islip 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 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 750 sqft. Most properties in this region are close to 9 stories. Most buildings in this area were built in 2003.