On average, listings lease in the $20's per square foot per year. The Marlborough submarket is going through a a boost in rates. In the last 3 months, the median rate went up $21 per sqft per year.
Compared to the rest of the Greater Boston market, the Marlborough region has less expensive rates, so you should have no trouble finding a great deal in this undervalued submarket.
In the last 90 days, 71 listings have been made available, so you'll want to check back regularly for new listings. About 15% of the office spaces in the Marlborough are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 4,670 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this area are approximately 2 floors. Most buildings in this area were built in 1986 and are Class A.