On average, listings lease in the $10's per square foot per year. The Manchester submarket is experiencing a a boost in rates. In the last 3 months, the median rate increased $17 per sqft per year.
In the last 90 days, 4 listings have come on the market, which means new listings are probably going fast. You'll want to be prepared to tour spaces as quick as possible. About 125% of the available space in the Manchester are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,360 sqft. Most buildings in this market are around 2 floors. Most buildings in this region were built in 1930 and are Class B.