Most listings are in the $10's per square foot per year. The Marlborough submarket is experiencing 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 Marlborough submarket has less expensive rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 47 listings have been listed, so you'll want to check back regularly for new listings. 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 1,130 sqft. Most buildings in this area are around 3 stories. Most buildings in this area were built in 1986 and are Class A.