Most listings are in the $10's per square foot per year. The Garden City region is going through a an increase in rates. In the last 3 months, the median rate went up $15 per sqft per year. That's a Inf% rise in rent.
In the last 90 days, 2 listings have been listed, which means spaces 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,000 sqft. Most buildings in this market are close to 2 floors. Most buildings in this area were built in 2001 and are Class A.