On average, listings lease in the $10's per square foot per year. The Norwich region is going through a an increase in rates. In the last 3 months, the median rate rose $3 per sqft per year. That's a 17% increase in rent.
In the last 90 days, 26 listings have come on the market, which means spaces most likley are 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.
Even though the median size is 3,000 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this region are close to 2 floors. Most buildings in this area were built in 1890 and are Class A.