The typical asking rate per listing is in the $20's per square foot per year. The Muttontown submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $2 per sqft per year. That's a 8% decrease in rent.
In the last 90 days, 1 listings have been posted online, 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 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 2,070 sqft. Most properties in this market are approximately 2 stories.