On average, listings lease in the $20's per square foot per year. The Plymouth region is going through a a boost in rates. In the last 3 months, the median rate rose $8 per sqft per year. That's a 50% rise 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 discounted submarket.
In the last 90 days, 5 listings have been made available, which means listings might be going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,560 sqft. Most buildings in this area were built in 1900 and are Class B.