Most listings are in the $20's per square foot per year. The Plymouth region is going through a decrease in rates. In the last 3 months, the median rate decreased $4 per sqft per year. That's a 15% decrease in rent.
Compared to the rest of the Greater Boston market, the Plymouth region has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 13 listings have been made available, which means leases might be leasing quickly. 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 1,500 sqft. Most buildings in this area were built in 1900 and are Class A.