Most listings are in the $20's per square foot per year. The New Hampshire region is experiencing a a rise in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 0% increase in rent.
In the last 90 days, 1552 listings have come on the market, so you'll want to check back regularly for new listings. About 23% of the available leases in the New Hampshire 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.
The standard measurement for office space in this area is around 1,600 sqft. Most properties in this area are close to 2 floors. Most buildings in this market were built in 1958 and are Class Class B.