On average, listings lease in the $10's per square foot per year. The Plymouth region is seeing a decline in rates. In the last 3 months, the median rate decreased $4 per sqft per year. That's a 16% decline 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 submarket.
In the last 90 days, 13 listings have come on the market, which means new availabilities are probably going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,540 sqft. Most buildings in this region were built in 1900 and are Class A.