I recognise that I’m probably a minority here, but I have a much harder time staying focused at home. At my office I share a room with a couple others, on a floor with a couple dozen more. Pretty much everything I do (outside 1-3 meetings a week) is individual work.
For me, something about physically “going to work” helps me “switch on” much more. Taking breaks with other people, rather than alone, also helps me structure the breaks, and it’s not uncommon that we get good ideas or resolve something that’s been bugging someone during a break. Lastly, I really appreciate the option of “just dropping by” when I want to ask someone about something, and the fact that they can do the same to me. In my experience it’s never gotten to the point that it happens more than maybe once or twice a day, so it’s not really that disturbing either.