It would depend on several factors- are you driving or taking the commuter rail or T? Where in Sudbury? Just to drive from one end of the town to the other could be 20 minutes. During rush hour I would assume at least 45 minutes, then add or subtract based on your starting point in Sudbury. Sorry, there isn't really an easy answer. My suggestion to potential buyers is to start in front the potential home and drive to work during rush hour, or drive there after work.
Hope this helps,