Most listings are in the $10's per square foot per year. The Brockton submarket is going through a decline in rates. In the last 3 months, the median rate fell $10 per sqft per year. That's a 33% decrease in rent.
Compared to the rest of the Greater Boston market, the Brockton submarket has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 16 listings have come on the market, which means spaces most likley are 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 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 1,840 sqft. Most buildings in this area are close to 2 stories. Most buildings in this area were built in 1986 and are Class A.