The typical asking rate per listing is in the $20's per square foot per year. The Concord region is going through a a rise in rates. In the last 3 months, the median rate rose $3 per sqft per year. That's a 14% rise in rent.
Compared to the rest of the Greater Boston market, the Concord region has higher rates, and you'll have to negotiate above asking rent to be in this hot submarket.
In the last 90 days, 65 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 1,750 sqft. Most properties in this market are close to 2 floors. Most buildings in this market were built in 1910 and are Class Class B.