The typical asking rate per listing is in the $20's per square foot per year. The Strafford County region is going through a an increase in rates. In the last 3 months, the median rate increased $6 per sqft per year. That's a 33% increase in rent.
In the last 90 days, 111 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 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 1,900 sqft. Most buildings in this region are around 2 floors. Most buildings in this market were built in 1940 and are Class Class B.