On average, listings lease in the $10's per square foot per year. The New Hampshire submarket is going through a decrease in rates. In the last 3 months, the median rate decreased $0 per sqft per year. That's a 1% decrease in rent.
In the last 90 days, 387 listings have been made available, so you'll want to check back regularly for new listings. About 3% of the office spaces in the New Hampshire are subleases, so you will probably have to consider a longer term lease. 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 2,280 sqft. Most properties in this market are approximately 2 stories. Most buildings in this area were built in 1928 and are Class Class B.