On average, listings lease in the $30's per square foot per year. The Portsmouth region is experiencing a an increase in rates. In the last 3 months, the median rate increased $11 per sqft per year. That's a 55% rise in rent.
Compared to the rest of the Greater Boston market, the Portsmouth region has more expensive rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 64 listings have come on the market, so you'll want to check back regularly for new listings. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,540 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this region were built in 1920 and are Class A.