Most listings are in the $20's per square foot per year. The Londonderry submarket is experiencing a a boost in rates. In the last 3 months, the median rate rose $2 per sqft per year. That's a 9% rise in rent.
Compared to the rest of the Greater Boston market, the Londonderry region has smaller rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 28 listings have been posted online, which means listings are probably going fast. You'll want to be prepared to make an offer immediately. 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 properties in this market are close to 2 floors. Most buildings in this market were built in 1988 and are Class B.