Most listings are in the $20's per square foot per year. The Manchester region is going through a an increase in rates. In the last 3 months, the median rate increased $24 per sqft per year.
In the last 90 days, 7 listings have come on the market, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 100% of the available leases in the Manchester are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 21,000 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this region are approximately 1 floors. Most buildings in this market were built in 1985 and are Class B.