On average, listings lease in the $30's per square foot per year. The Rockville Centre submarket is experiencing a an increase in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 4% increase in rent.
In the last 90 days, 3 listings have been posted online, which means listings are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,560 sqft. Most buildings in this region are around 2 floors. Most buildings in this area were built in 1972 and are Class C.