You owe the companies nothing. You especially don't owe them any courtesy. They have re-arranged the world to put themselves in front of you. They never asked for your permission, don't even start asking for theirs.
I am really chained to my computer these days so I work in my bedroom, which is a room I have worked in for years and years. It is just as much an office as a bedroom, and during the day, my bed is rather like an extension of my desk.