Most listings are in the $30's per square foot per year. The Litchfield submarket is seeing a an increase in rates. In the last 3 months, the median rate rose $30 per sqft per year. That's a Inf% rise in rent.
In the last 90 days, 3 listings have been made available, which means listings are probably going fast. You'll want to be prepared to make an offer immediately. 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 1,100 sqft. Most buildings in this region were built in 1900.