Most listings are in the $70's per square foot per year. The Portsmouth County region is going through a an increase in rates. In the last 3 months, the median rate went up $57 per sqft per year. That's a 264% rise in rent.
In the last 90 days, 16 listings have been made available, which means office spaces might be 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 7,390 sqft, there are still 0 leases below 2,000 sqft. Most properties in this area are close to 2 floors. Most buildings in this area were built in 1978 and are Class C.