I was distracted easily in an office, too, but it was different distractions (usually coworkers wanting to talk to me, or the whole room, about some issue that's not important to answer right away). At home, my issue is really self-discipline. I'm the cause of my own distractions when I'm working from home, and this can potentially lead to boundless distraction.

In theory, it's a lot easier for me to stay focused when I'm at home, and many days that is the case, but in practice my lack of discipline and procrastination become problems.