Most listings are in the $20's per square foot per year. The Exeter submarket is seeing a an increase in rates. In the last 3 months, the median rate rose $21 per sqft per year.
Compared to the rest of the Greater Boston market, the Exeter region has smaller rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 5 listings have come on the market, which means leases most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 2,800 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this area are approximately 3 floors. Most buildings in this market were built in 1900 and are Class A.