On average, listings lease in the $30's per square foot per year. The Garden City region is experiencing a decrease in rates. In the last 3 months, the median rate decreased $5 per sqft per year. That's a 12% decline in rent.
In the last 90 days, 4 listings have been posted online, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 950% of the available space in the Garden City are subleases, so you might be able to snag a great spot on a short term. 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 1,540 sqft. Most buildings in this area are approximately 3 floors. Most buildings in this area were built in 1969 and are Class B.