The typical asking rate per listing is in the $10's per square foot per year. The Hampton submarket is seeing a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 4% decline in rent.
Compared to the rest of the Greater Boston market, the Hampton submarket has smaller rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 30 listings have been listed, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 800 sqft. Most buildings in this area are around 2 stories. Most buildings in this area were built in 1969 and are Class A.