On average, listings lease in the $20's per square foot per year. The Merrimack County submarket is going through a a rise in rates. In the last 3 months, the median rate rose $29 per sqft per year.
In the last 90 days, 181 listings have been listed, so you'll want to check back regularly for new listings. About 31% of the available leases in the Merrimack County 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 620 sqft. Most buildings in this market are around 2 floors. Most buildings in this market were built in 1950 and are Class Class B.