On average, listings lease in the $10's per square foot per year. The Hampshire County region is going through a decline in rates. In the last 3 months, the median rate fell $12 per sqft per year. That's a 39% decrease in rent.
In the last 90 days, 1 listings have come on the market, which means leases are probably leasing quickly. You'll want to be prepared to make an offer immediately. 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 2,200 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this area were built in 1846 and are Class Class B.