On average, listings lease in the $30's per square foot per year. The Barnstable Town region is going through a a rise in rates. In the last 3 months, the median rate rose $10 per sqft per year. That's a 43% rise in rent.
Compared to the rest of the Greater Boston market, the Barnstable Town submarket has more expensive rates, and you'll have to negotiate above asking rent to be in this hot region.
In the last 90 days, 11 listings have been posted online, which means new availabilities most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. 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 1,450 sqft. Most properties in this area are close to 1 stories. Most buildings in this area were built in 1987 and are Class B.