Most listings are in the $10's per square foot per year. The Dedham submarket is seeing a a rise in rates. In the last 3 months, the median rate rose $18 per sqft per year.
Compared to the rest of the Greater Boston market, the Dedham submarket has lower rates, so you should have no trouble finding a great deal in this depreciated region.
In the last 90 days, 1 listings have been made available, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. 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 2,030 sqft. Most properties in this region are close to 2 floors. Most buildings in this market were built in 1975 and are Class A.