The typical asking rate per listing is in the $20's per square foot per year. The Plymouth submarket is experiencing a decrease in rates. In the last 3 months, the median rate fell $4 per sqft per year. That's a 15% 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 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 posted, 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 region were built in 1900 and are Class A.