On average, listings lease in the $20's per square foot per year. The Massachusetts submarket is going through a an increase in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 3% increase in rent.
In the last 90 days, 2200 listings have come on the market, so you'll want to check back regularly for new listings. About 2% of the available leases in the Massachusetts are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,870 sqft. Most properties in this area are approximately 3 stories. Most buildings in this area were built in 1975 and are Class A.