The typical asking rate per listing is in the $10's per square foot per year. The Milford region is seeing a decline in rates. In the last 3 months, the median rate decreased $5 per sqft per year. That's a 25% decrease in rent.
Compared to the rest of the Greater Boston market, the Milford submarket has lower rates, so you should have no trouble finding a great deal in this depreciated submarket.
In the last 90 days, 4 listings have been listed, which means spaces 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 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 1,200 sqft. Most properties in this region are close to 2 floors. Most buildings in this area were built in 1989 and are Class A.