On average, listings lease in the $30's per square foot per year. The Garden City submarket is going through a decrease in rates. In the last 3 months, the median rate fell $6 per sqft per year. That's a 14% decrease in rent.
In the last 90 days, 5 listings have come on the market, which means new listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. 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 2,400 sqft. Most properties in this market are approximately 3 stories. Most buildings in this region were built in 1965 and are Class B.