On average, listings lease in the $0's per square foot per year. The Riverhead submarket is seeing a decline in rates. In the last 3 months, the median rate decreased $30 per sqft per year. That's a 100% decline in rent.
In the last 90 days, 1 listings have been listed, which means listings are probably going fast. 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 sqft. Most buildings in this area are close to 1 stories. Most buildings in this market were built in 1989 and are Class B.